目錄
- 案例：用戶信息列表增刪改查及登錄
- 功能實現分析：
- 項目目錄總覽
- 代碼
- UserDao.java
- UserDaoImpl.java
- PageBean.java
- User.java
- UserService.java
- UserServiceImpl.java
- JDBCUtils.java
- AddUserServlet.java
- CheckCodeServlet.java
- DelSelectedServlet.java
- DelUserServlet.java
- FindUserByPageServlet.java
- FindUserServlet.java
- LoginServlet.java
- UpdateUserServlet.java
- UserListServlet.java
- add.jsp
- index.jsp
- list.jsp
- login.jsp
- update.jsp
案例：用戶信息列表增刪改查及登錄
技術選型：Servlet+JSP+MySQL+JDBCTempleat+Duird+BeanUtilS（封裝數據）+tomcat
數據庫設計：
CREATE TABLE USER( -- 創建表
id INT PRIMARY KEY AUTO_INCREMENT,
NAME VARCHAR(20) NOT NULL,
gender VARCHAR(5),
age INT,
address VARCHAR(32),
qq VARCHAR(20),
email VARCHAR(50),
username VARCHAR(32),
password VARCHAR(32)
);
jar包：
導入druid配置文件(druid.properties)到src目錄下；
導入JDBC工具類（JDBCUtils.java）到util下
功能實現分析：
1. 簡單功能
1. 基礎列表查詢
2. 登錄
3. 添加
4. 刪除
5. 修改（隱藏域要在form里才能被提交）
2. 復雜功能
1. 刪除選中
2. 分頁查詢
* 好處：
1. 減輕服務器內存的開銷
2. 提升用戶體驗
輸入輸出分析：
實現：
3. 復雜條件查詢
(動態生成sql查詢語句）
4. 登錄
1. 調整頁面，加入驗證碼功能
2. 代碼實現
項目目錄總覽
代碼
UserDao.java
package cn.itcast.dao;
import cn.itcast.domain.User;
import java.util.List;
import java.util.Map;
/**
* 用戶操作的DAO
*/
public interface UserDao {
public List<User> findAll();
public User findUserByUsernameAndPassword(String username,String password);
void add(User user);
void delete(int id);
User findById(int id);
void update(User user);
/**
* 查詢總記錄數
* @return
* @param condition
*/
int findTotalCount(Map<String, String[]> condition);
/**
* 分頁查詢每頁記錄
* @param start
* @param rows
* @param condition
* @return
*/
List<User> findByPage(int start, int rows, Map<String, String[]> condition);
}
UserDaoImpl.java
package cn.itcast.dao.impl;
import cn.itcast.dao.UserDao;
import cn.itcast.domain.User;
import cn.itcast.util.JDBCUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class UserDaoImpl implements UserDao {
private JdbcTemplate template= new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public List<User> findAll() {
//使用JDBC操作數據庫
//1 定義sql
String sql = "select * from user";
List<User> users = template.query(sql, new BeanPropertyRowMapper<User>(User.class));
return users;
}
@Override
public User findUserByUsernameAndPassword(String username, String password) {
try {
String sql = "select * from user where username = ? and password = ?";
User user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class),username,password);
return user;
} catch (DataAccessException e) {
e.printStackTrace();
return null;
}
}
@Override
public void add(User user) {
//1 定義sql
String sql = "insert into user values(null,?,?,?,?,?,?,null,null)";
//2 執行sql
template.update(sql,user.getName(),user.getGender(),user.getAge(),user.getAddress(),user.getQq(),user.getEmail());
}
@Override
public void delete(int id) {
//1 定義sql
String sql = "delete from user where id = ?";
//2 執行sql
template.update(sql,id);
}
@Override
public User findById(int id) {
String sql ="select * from user where id =?";
return template.queryForObject(sql,new BeanPropertyRowMapper<User>(User.class),id);
}
@Override
public void update(User user) {
String sql = "update user set name = ? , gender=? , age = ?,address = ? ,qq = ? ,email = ? where id =?";
template.update(sql,user.getName(),user.getGender(),user.getAge(),user.getAddress(),user.getQq(),user.getEmail(),user.getId());
}
@Override
public int findTotalCount(Map<String, String[]> condition) {
//動態sql查詢，動態生成sql查詢語句
//1 定義模板初始化sql, 注意空格！
String sql = "select count(*) from user where 1=1";
StringBuilder sb = new StringBuilder(sql);
//2 遍歷map
Set<String> keySet = condition.keySet();
//定義參數的集合
List<Object> params = new ArrayList<Object>();
for (String key : keySet) {
//排除分頁條件參數
if("currentPage".equals(key)||"rows".equals(key)){
continue;
}
//獲取value
String value = condition.get(key)[0];
//判斷value是否有值
if(value !=null && !"".equals(value)){
//有值, 注意空格！
sb.append(" and "+key+" like ? ");
params.add("%"+value+"%");//?條件的值
}
}
//System.out.println(sb.toString());
//System.out.println(params);
//dao層返回int方法
//List轉化為Object數組:toArray()
return template.queryForObject(sb.toString(),Integer.class,params.toArray());
}
@Override
public List<User> findByPage(int start, int rows, Map<String, String[]> condition) {
String sql = "select * from user WHERE 1 = 1 ";
StringBuilder sb = new StringBuilder(sql);
//2 遍歷map
Set<String> keySet = condition.keySet();
//定義參數的集合
List<Object> params = new ArrayList<Object>();
for (String key : keySet) {
//排除分頁條件參數
if("currentPage".equals(key)||"rows".equals(key)){
continue;
}
//獲取value
String value = condition.get(key)[0];
//判斷value是否有值
if(value !=null && !"".equals(value)){
//有值, 注意空格！
sb.append(" and "+key+" like ? ");
params.add("%"+value+"%");//?條件的值
}
}
//添加分頁查詢
sb.append(" limit ?,? ");
//添加分頁查詢參數值
params.add(start);
params.add(rows);
sql = sb.toString();
//System.out.println(sql);
//System.out.println(params);
return template.query(sql,new BeanPropertyRowMapper<User>(User.class),params.toArray());
}
}
PageBean.java
package cn.itcast.domain;
import java.util.List;
/**
* 分頁對象
*/
public class PageBean<T> {
private int totalCount;//總記錄數
private int totalPage;//總頁碼
private List<T> list;//每頁的數據
private int currentPage;//當前頁碼
private int rows;//每頁顯示的記錄數
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public List<T> getList() {
return list;
}
public void setList(List<T> list) {
this.list = list;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
public int getRows() {
return rows;
}
public void setRows(int rows) {
this.rows = rows;
}
@Override
public String toString() {
return "PageBean{" +
"totalCount=" + totalCount +
", totalPage=" + totalPage +
", list=" + list +
", currentPage=" + currentPage +
", rows=" + rows +
'}';
}
}
User.java
package cn.itcast.domain;
public class User {
private int id;
private String name;
private String gender;
private int age;
private String address;
private String qq;
private String email;
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getQq() {
return qq;
}
public void setQq(String qq) {
this.qq = qq;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", gender='" + gender + '\'' +
", age=" + age +
", address='" + address + '\'' +
", qq='" + qq + '\'' +
", email='" + email + '\'' +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
}
UserService.java
package cn.itcast.service;
import cn.itcast.domain.PageBean;
import cn.itcast.domain.User;
import java.util.List;
import java.util.Map;
/**
* 用戶管理的業務接口
*/
public interface UserService {
/**
* 查詢所有用戶信息
* @return
*/
public List<User> findAll();
/**
* 登錄
*/
public User login(User user);
/**
* 保存User
* @param user
*/
void addUser(User user);
/**
* 根據id刪除User
* @param id
*/
void deleteUser(String id);
/**
* 根據id查詢User
* @param id
* @return
*/
User findUserById(String id);
/**
* 修改用戶信息
* @param user
*/
void updateUser(User user);
/**
* 批量刪除用戶
* @param ids
*/
void delSelectedUser(String[] ids);
/**
*分頁條件查詢
* @param currentPage
* @param rows
* @param condition
* @return
*/
PageBean<User> fingUserByPage(String currentPage, String rows, Map<String, String[]> condition);
}
UserServiceImpl.java
package cn.itcast.service.impl;
import cn.itcast.dao.UserDao;
import cn.itcast.dao.impl.UserDaoImpl;
import cn.itcast.domain.PageBean;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import java.util.List;
import java.util.Map;
public class UserServiceImpl implements UserService{
private UserDao dao = new UserDaoImpl();
@Override
public List<User> findAll() {
//調用Dao完成查詢
return dao.findAll();
}
@Override
public User login(User user) {
return dao.findUserByUsernameAndPassword(user.getUsername(),user.getPassword());
}
@Override
public void addUser(User user) {
dao.add(user);
}
@Override
public void deleteUser(String id) {
//String轉Int
dao.delete(Integer.parseInt(id));
}
@Override
public User findUserById(String id) {
//String轉Int
return dao.findById(Integer.parseInt(id));
}
@Override
public void updateUser(User user) {
dao.update(user);
}
@Override
public void delSelectedUser(String[] ids) {
if(ids != null && ids.length > 0){
//1 遍歷數組
for (String id : ids) {
//2 調用dao刪除
//String轉int
dao.delete(Integer.parseInt(id));
}
}
}
@Override
public PageBean<User> fingUserByPage(String _currentPage, String _rows, Map<String, String[]> condition) {
int currentPage = Integer.parseInt(_currentPage);
int rows = Integer.parseInt(_rows);
//分頁限制
if(currentPage <=0){
currentPage = 1;
}
// 1 創建空的PageBean對象
PageBean<User> pb = new PageBean<>();
//2 設置參數：每頁顯示的記錄數
pb.setRows(rows);
//3 調用dao查詢總記錄數
int totalCount = dao.findTotalCount(condition);
pb.setTotalCount(totalCount);
//計算總頁碼
int totalPage = (totalCount % rows) == 0 ? totalCount/rows : (totalCount/rows)+1;
//分頁限制
if(currentPage > totalPage){
currentPage = totalPage;
}
//設置當前頁碼
pb.setCurrentPage(currentPage);
//4 調用dao查詢List集合
//計算開始的記錄索引
int start = (currentPage - 1)* rows;
List<User> list= dao.findByPage(start,rows,condition);
pb.setList(list);
//5 設置總頁碼
pb.setTotalPage(totalPage);
return pb;
}
}
JDBCUtils.java
package cn.itcast.util;
import com.alibaba.druid.pool.DruidDataSourceFactory;
import javax.sql.DataSource;
import javax.xml.crypto.Data;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
/**
* JDBC工具類 使用Durid連接池
*/
public class JDBCUtils {
private static DataSource ds ;
static {
try {
//1.加載配置文件
Properties pro = new Properties();
//使用ClassLoader加載配置文件，獲取字節輸入流
InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties");
pro.load(is);
//2.初始化連接池對象
ds = DruidDataSourceFactory.createDataSource(pro);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 獲取連接池對象
*/
public static DataSource getDataSource(){
return ds;
}
/**
* 獲取連接Connection對象
*/
public static Connection getConnection() throws SQLException {
return ds.getConnection();
}
}
AddUserServlet.java
package cn.itcast.web.servlet;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/addUserServlet")
public class AddUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1 設置編碼
request.setCharacterEncoding("utf-8");
//2 獲取參數
Map<String, String[]> map = request.getParameterMap();
//3 封裝對象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//4 調用Service保存
UserService service = new UserServiceImpl();
service.addUser(user);
//5 跳轉
response.sendRedirect((request.getContextPath()+"/findUserByPageServlet"));
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
CheckCodeServlet.java
package cn.itcast.web.servlet;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 驗證碼
*/
@WebServlet("/checkCodeServlet")
public class CheckCodeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
//服務器通知瀏覽器不要緩存
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setHeader("expires","0");
//在內存中創建一個長80，寬30的圖片，默認黑色背景
//參數一：長
//參數二：寬
//參數三：顏色
int width = 80;
int height = 30;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
//獲取畫筆
Graphics g = image.getGraphics();
//設置畫筆顏色為灰色
g.setColor(Color.GRAY);
//填充圖片
g.fillRect(0,0, width,height);
//產生4個隨機驗證碼，12Ey
String checkCode = getCheckCode();
//將驗證碼放入HttpSession中
request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);
//設置畫筆顏色為黃色
g.setColor(Color.YELLOW);
//設置字體的小大
g.setFont(new Font("黑體",Font.BOLD,24));
//向圖片上寫入驗證碼
g.drawString(checkCode,15,25);
//將內存中的圖片輸出到瀏覽器
//參數一：圖片對象
//參數二：圖片的格式，如PNG,JPG,GIF
//參數三：圖片輸出到哪里去
ImageIO.write(image,"PNG",response.getOutputStream());
}
/**
* 產生4位隨機字符串
*/
private String getCheckCode() {
String base = "0123456789ABCDEFGabcdefg";
int size = base.length();
Random r = new Random();
StringBuffer sb = new StringBuffer();
for(int i=1;i<=4;i++){
//產生0到size-1的隨機值
int index = r.nextInt(size);
//在base字符串中獲取下標為index的字符
char c = base.charAt(index);
//將c放入到StringBuffer中去
sb.append(c);
}
return sb.toString();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request,response);
}
}
DelSelectedServlet.java
package cn.itcast.web.servlet;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/delSelectedServlet")
public class DelSelectedServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 1 獲取所有id
String[] ids = request.getParameterValues("uid");
// 2 調用service刪除
UserService service = new UserServiceImpl();
service.delSelectedUser(ids);
// 3 跳轉查詢所有Servlet
response.sendRedirect((request.getContextPath()+"/findUserByPageServlet"));
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
DelUserServlet.java
package cn.itcast.web.servlet;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/delUserServlet")
public class DelUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1 獲取id
String id = request.getParameter("id");
//2 調用Service刪除
UserService service = new UserServiceImpl();
service.deleteUser(id);
//3 跳轉到查詢頁面
response.sendRedirect((request.getContextPath()+"/findUserByPageServlet"));
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
FindUserByPageServlet.java
package cn.itcast.web.servlet;
import cn.itcast.domain.PageBean;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Map;
@WebServlet("/findUserByPageServlet")
public class FindUserByPageServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//設置編碼
request.setCharacterEncoding("utf-8");
// 1 獲取參數
String currentPage = request.getParameter("currentPage");//當前頁碼
String rows = request.getParameter("rows");//每頁顯示條數
if(currentPage == null || "".equals(currentPage)){
currentPage="1";
}
if(rows == null || "".equals(rows)){
rows="5";
}
//獲取條件查詢參數
Map<String, String[]> condition = request.getParameterMap();
// 2 調用service查詢
UserService service = new UserServiceImpl();
PageBean<User> pb = service.fingUserByPage(currentPage,rows,condition);
System.out.println(pb);
//3 將PageBean存入request
request.setAttribute("pb",pb);
//將查詢條件存入request
request.setAttribute("condition",condition);
//4 轉發到list.jsp
request.getRequestDispatcher("/list.jsp").forward(request,response);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
FindUserServlet.java
package cn.itcast.web.servlet;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/findUserServlet")
public class FindUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1 獲取id
String id = request.getParameter("id");
//2 調用Service查詢
UserService service = new UserServiceImpl();
User user = service.findUserById(id);
//3 將user存入request
request.setAttribute("user",user);
//4 轉發到update.jsp
request.getRequestDispatcher("update.jsp").forward(request,response);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
LoginServlet.java
package cn.itcast.web.servlet;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1 設置編碼
request.setCharacterEncoding("utf-8");
//2 獲取數據
//2.1 獲取用戶填寫的驗證碼
String verifycode = request.getParameter("verifycode");
Map<String, String[]> map = request.getParameterMap();
//3 驗證碼校驗
HttpSession session = request.getSession();
String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER");
session.removeAttribute("CHECKCODE_SERVER");//確保驗證碼一次性
if(checkcode_server == null || (!checkcode_server.equalsIgnoreCase(verifycode))){
//驗證碼不正確
//提示信息
request.setAttribute("login_msg","驗證碼錯誤");
//跳轉登錄頁面
request.getRequestDispatcher("/login.jsp").forward(request,response);
return;
}
//4 封裝User對象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//5 調用Service查詢
UserService service= new UserServiceImpl();
User loginUser= service.login(user);
//6 判斷登錄是否成功
if(loginUser!=null){
//登錄成功
// 將用戶存入session
session.setAttribute("user",loginUser);
//跳轉頁面
response.sendRedirect(request.getContextPath()+"/index.jsp");
}else {
//登錄失敗
//提示信息
request.setAttribute("login_msg","用戶名或密碼錯誤");
//跳轉登錄頁面
request.getRequestDispatcher("/login.jsp").forward(request,response);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
UpdateUserServlet.java
package cn.itcast.web.servlet;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/updateUserServlet")
public class UpdateUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1 設置編碼
request.setCharacterEncoding("utf-8");
//2 獲取map
Map<String, String[]> map = request.getParameterMap();
//3 封裝對象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//4 調用Service修改
UserService service =new UserServiceImpl();
service.updateUser(user);
//5 跳轉到查詢所有Servlet
response.sendRedirect((request.getContextPath()+"/findUserByPageServlet"));
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
UserListServlet.java
package cn.itcast.web.servlet;
import cn.itcast.domain.User;
import cn.itcast.service.UserService;
import cn.itcast.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@WebServlet("/userListServlet")
public class UserListServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1 調用UserService完成查詢
UserService service= new UserServiceImpl();
List<User> users = service.findAll();
//2 將list存入request域
request.setAttribute("users",users);
//3 轉發到list.jsp
request.getRequestDispatcher("/list.jsp").forward(request,response);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
add.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<!-- 網頁使用的語言 -->
<html lang="zh-CN">
<head>
<!-- 指定字符集 -->
<meta charset="utf-8">
<!-- 使用Edge最新的瀏覽器的渲染方式 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- viewport視口：網頁可以根據設置的寬度自動進行適配，在瀏覽器的內部虛擬一個容器，容器的寬度與設備的寬度相同。
width: 默認寬度與設備的寬度相同
initial-scale: 初始的縮放比，為1:1 -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3個meta標簽*必須*放在最前面，任何其他內容都*必須*跟隨其后！ -->
<title>添加用戶</title>
<!-- 1. 導入CSS的全局樣式 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- 2. jQuery導入，建議使用1.9以上的版本 -->
<script src="js/jquery-2.1.0.min.js"></script>
<!-- 3. 導入bootstrap的js文件 -->
<script src="js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<center><h3>添加聯系人頁面</h3></center>
<form action="${pageContext.request.contextPath}/addUserServlet" method="post">
<div class="form-group">
<label for="name">姓名：</label>
<input type="text" class="form-control" id="name" name="name" placeholder="請輸入姓名">
</div>
<div class="form-group">
<label>性別：</label>
<input type="radio" name="gender" value="男" checked="checked"/>男
<input type="radio" name="gender" value="女"/>女
</div>
<div class="form-group">
<label for="age">年齡：</label>
<input type="text" class="form-control" id="age" name="age" placeholder="請輸入年齡">
</div>
<div class="form-group">
<label for="address">籍貫：</label>
<select name="address" class="form-control" id="jiguan">
<option value="廣東">廣東</option>
<option value="廣西">廣西</option>
<option value="湖南">湖南</option>
</select>
</div>
<div class="form-group">
<label for="qq">QQ：</label>
<input type="text" class="form-control" name="qq" placeholder="請輸入QQ號碼"/>
</div>
<div class="form-group">
<label for="email">Email：</label>
<input type="text" class="form-control" name="email" placeholder="請輸入郵箱地址"/>
</div>
<div class="form-group" style="text-align: center">
<input class="btn btn-primary" type="submit" value="提交" />
<input class="btn btn-default" type="reset" value="重置" />
<input class="btn btn-default" type="button" value="返回" />
</div>
</form>
</div>
</body>
</html>
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>首頁</title>
<!-- 1. 導入CSS的全局樣式 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- 2. jQuery導入，建議使用1.9以上的版本 -->
<script src="js/jquery-2.1.0.min.js"></script>
<!-- 3. 導入bootstrap的js文件 -->
<script src="js/bootstrap.min.js"></script>
<script type="text/javascript">
</script>
</head>
<body>
<div align="center">${user.name},歡迎您~~</div>
<div align="center">
<a
href="${pageContext.request.contextPath}//findUserByPageServlet" style="text-decoration:none;font-size:33px">查詢所有用戶信息
</a>
</div>
</body>
</html>
list.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 網頁使用的語言 -->
<html lang="zh-CN">
<head>
<!-- 指定字符集 -->
<meta charset="utf-8">
<!-- 使用Edge最新的瀏覽器的渲染方式 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- viewport視口：網頁可以根據設置的寬度自動進行適配，在瀏覽器的內部虛擬一個容器，容器的寬度與設備的寬度相同。
width: 默認寬度與設備的寬度相同
initial-scale: 初始的縮放比，為1:1 -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3個meta標簽*必須*放在最前面，任何其他內容都*必須*跟隨其后！ -->
<title>用戶信息管理系統</title>
<!-- 1. 導入CSS的全局樣式 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- 2. jQuery導入，建議使用1.9以上的版本 -->
<script src="js/jquery-2.1.0.min.js"></script>
<!-- 3. 導入bootstrap的js文件 -->
<script src="js/bootstrap.min.js"></script>
<style type="text/css">
td, th {
text-align: center;
}
</style>
<script>
function deleteUser(id) {
// 用戶安全提示
if(confirm("您確定要刪除嗎？")){
//訪問路徑
location.href="${pageContext.request.contextPath}/delUserServlet?id="+id;
}
}
window.onload = function () {
//給刪除選中按鈕添加單擊事件
document.getElementById("delSelected").onclick=function () {
if(confirm("您確定要刪除選中條目嗎")){
var flag = false;
//判斷是否有選中條目
var cbs = document.getElementsByName("uid");
for(var i = 0; i<cbs.length;i++){
if (cbs[i].checked){
//有條目選中
flag = true;
break;
}
}
if(flag){
//javascript中的表單提交
document.getElementById("form").submit();
}
}
}
//全選功能
//1 獲取第一個cb
document.getElementById("firstCb").onclick = function () {
//2 獲取下邊列表中的所有cb
var cbs = document.getElementsByName("uid");
//3 遍歷
for(var i =0;i < cbs.length;i++){
//4 設置這些cbs[i]的checked狀態 = firstCb.checked
cbs[i].checked=this.checked;
}
}
}
</script>
</head>
<body>
<div class="container">
<h3 style="text-align: center">用戶信息列表</h3>
<%--表單--%>
<div style="float: left;">
<form class="form-inline" action="${pageContext.request.contextPath}/findUserByPageServlet" method="post">
<div class="form-group">
<label for="exampleInputName2">姓名</label>
<input type="text" value="${condition.name[0]}" class="form-control" id="exampleInputName2" name="name">
</div>
<div class="form-group">
<label for="exampleInputName3">籍貫</label>
<input type="text" value="${condition.address[0]}"class="form-control" id="exampleInputName3" name="address">
</div>
<div class="form-group">
<label for="exampleInputEmail2">郵箱</label>
<input type="text" value="${condition.email[0]}"class="form-control" id="exampleInputEmail2" name="email">
</div>
<button type="submit" class="btn btn-default">查詢</button>
</form>
</div>
<%--按鈕--%>
<div style="float: right;margin: 5px">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加聯系人</a>
<a class="btn btn-primary" href="javascript:void(0);" id="delSelected">刪除選中</a>
</div>
<form id="form" action="${pageContext.request.contextPath}/delSelectedServlet" method="post">
<table border="1" class="table table-bordered table-hover">
<tr class="success">
<th><input type="checkbox"id="firstCb"></th>
<th>編號</th>
<th>姓名</th>
<th>性別</th>
<th>年齡</th>
<th>籍貫</th>
<th>QQ</th>
<th>郵箱</th>
<th>操作</th>
</tr>
<c:forEach items="${pb.list}" var="user" varStatus="s">
<tr>
<td><input type="checkbox" name="uid" value="${user.id}"></td>
<td>${s.count}</td>
<td>${user.name}</td>
<td>${user.gender}</td>
<td>${user.age}</td>
<td>${user.address}</td>
<td>${user.qq}</td>
<td>${user.email}</td>
<td><a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/findUserServlet?id=${user.id}">修改</a>
<a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id});">刪除</a></td>
</tr>
</c:forEach>
</table>
</form>
<div>
<nav aria-label="Page navigation">
<ul class="pagination">
<c:if test="${pb.currentPage == 1}">
<li class="disabled">
<%--<span aria-hidden="true">«</span>--%>
<a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage-1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
</c:if>
<c:if test="${pb.currentPage != 1}">
<li>
<a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage-1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
</c:if>
<c:forEach begin="1" end="${pb.totalPage}" var="i">
<c:if test="${pb.currentPage == i}">
<li class="active"><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li>
</c:if>
<c:if test="${pb.currentPage != i}">
<li ><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li>
</c:if>
</c:forEach>
<c:if test="${pb.currentPage >= pb.totalPage}">
<li class="disabled">
<a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage+1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</c:if>
<c:if test="${pb.currentPage < pb.totalPage}">
<li >
<a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage+1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</c:if>
<span style="font-size: 25px;margin-left: 5px;">
共${pb.totalCount}條記錄，共${pb.totalPage}頁
</span>
</ul>
</nav>
</div>
</div>
</body>
</html>
login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>管理員登錄</title>
<!-- 1. 導入CSS的全局樣式 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- 2. jQuery導入，建議使用1.9以上的版本 -->
<script src="js/jquery-2.1.0.min.js"></script>
<!-- 3. 導入bootstrap的js文件 -->
<script src="js/bootstrap.min.js"></script>
<script type="text/javascript">
//切換驗證碼
function refreshCode(){
// 1 獲取驗證碼圖片對象
var vcode = document.getElementById("vcode");
// 2 設置其src屬性，加時間戳
vcode.src = "${pageContext.request.contextPath}/checkCodeServlet?time="+new Date().getTime();
}
</script>
</head>
<body>
<div class="container" style="width: 400px;">
<h3 style="text-align: center;">管理員登錄</h3>
<form action="${pageContext.request.contextPath}/loginServlet" method="post">
<div class="form-group">
<label for="user">用戶名：</label>
<input type="text" name="username" class="form-control" id="user" placeholder="請輸入用戶名"/>
</div>
<div class="form-group">
<label for="password">密碼：</label>
<input type="password" name="password" class="form-control" id="password" placeholder="請輸入密碼"/>
</div>
<div class="form-inline">
<label for="vcode">驗證碼：</label>
<input type="text" name="verifycode" class="form-control" id="verifycode" placeholder="請輸入驗證碼" style="width: 120px;"/>
<a href="javascript:refreshCode()">
<img src="${pageContext.request.contextPath}/checkCodeServlet" title="看不清點擊刷新" id="vcode"/>
</a>
</div>
<hr/>
<div class="form-group" style="text-align: center;">
<input class="btn btn btn-primary" type="submit" value="登錄">
</div>
</form>
<!-- 出錯顯示的信息框 -->
<div class="alert alert-warning alert-dismissible" role="alert">
<button type="button" class="close" data-dismiss="alert" >
<span>×</span></button>
<strong>${login_msg}</strong>
</div>
</div>
</body>
</html>
update.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 網頁使用的語言 -->
<html lang="zh-CN">
<head>
<!-- 指定字符集 -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>修改用戶</title>
<link href="css/bootstrap.min.css" rel="stylesheet">
<script src="js/jquery-2.1.0.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</head>
<body>
<div class="container" style="width: 400px;">
<h3 style="text-align: center;">修改聯系人</h3>
<form action="${pageContext.request.contextPath}/updateUserServlet" method="post">
<%--隱藏域提交id--%>
<input type="hidden" name="id" value="${user.id}">
<div class="form-group">
<label for="name">姓名：</label>
<%--名字（姓名）不能更改，readonly="readonly"--%>
<input type="text" class="form-control" id="name" name="name" value="${user.name}" readonly="readonly" placeholder="請輸入姓名" />
</div>
<div class="form-group">
<label>性別：</label>
<c:if test="${user.gender == '男'}">
<input type="radio" id="gender" name="gender" value="男" checked/>男
<input type="radio" id="gender" name="gender" value="女" />女
</c:if>
<c:if test="${user.gender== '女'}">
<input type="radio" id="gender" name="gender" value="男" />男
<input type="radio" id="gender" name="gender" value="女" checked/>女
</c:if>
</div>
<div class="form-group">
<label for="age">年齡：</label>
<input type="text" class="form-control" id="age" name="age" value="${user.age}" placeholder="請輸入年齡" />
</div>
<div class="form-group">
<label for="address">籍貫：</label>
<select id="address" name="address" class="form-control" >
<c:if test="${user.address=='北京'}">
<option value="廣東">廣東</option>
<option value="河北">河北</option>
<option value="上海">上海</option>
<option value="北京" selected>北京</option>
</c:if>
<c:if test="${user.address=='廣東'}">
<option value="廣東"selected>廣東</option>
<option value="河北">河北</option>
<option value="上海">上海</option>
<option value="北京" >北京</option>
</c:if>
<c:if test="${user.address=='河北'}">
<option value="廣東">廣東</option>
<option value="河北" selected>河北</option>
<option value="上海">上海</option>
<option value="北京" >北京</option>
</c:if>
<c:if test="${user.address=='上海'}">
<option value="廣東">廣東</option>
<option value="河北">河北</option>
<option value="上海" selected>上海</option>
<option value="北京" >北京</option>
</c:if>
</select>
</div>
<div class="form-group">
<label for="qq">QQ：</label>
<input type="text" id="qq" class="form-control" name="qq"value="${user.qq}" placeholder="請輸入QQ號碼"/>
</div>
<div class="form-group">
<label for="email">Email：</label>
<input type="text"id="email" class="form-control" name="email" value="${user.email}"placeholder="請輸入郵箱地址"/>
</div>
<div class="form-group" style="text-align: center">
<input class="btn btn-primary" type="submit" value="提交" />
<input class="btn btn-default" type="reset" value="重置" />
<input class="btn btn-default" type="button" value="返回"/>
</div>
</form>
</div>
</body>
</html>