1.新建一個maven工程，選webapp模板
2.安裝tomcat
https://tomcat.apache.org/download-80.cgi 下載解壓到自定義目錄上
ps:在全局變量加上JAVA_HOME變量指向JDK（例如:D:\Java\v1.8）,tomcat才能正常運行
3.eclipse配置server
Windows-->Preferences-->Server-->Runtime Environments
添加tomcat
4.增加tomcat的libary
工程右擊--->Build Path --->Configure Build path
選擇剛剛加到eclipse的tomcat
5.編寫jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <form action="${pageContext.request.contextPath}/saveUserInfo" method="GET"> username:<input type="text" name="username"></input><br/> adress:<input type="text" name="address"></input> <input type="submit" value="保存"/> </form> </body> </html>
6.編寫映射到servlet接口類的配置文件，web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>hello</servlet-name> <servlet-class>amie.servlet.helloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>hello</servlet-name> <url-pattern>/saveUserInfo</url-pattern> </servlet-mapping> </web-app>
7.編寫servlet類
從上面可以得到，tomcat服務器的路徑“/saveUserInfo”已經映射到“amie.servlet.helloServlet”這個類上了
package amie.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import jdbc.jdbc; public class helloServlet extends HttpServlet { protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("gbk"); String username = new String(request.getParameter("username").getBytes("UTF8")); String address = new String(request.getParameter("address").getBytes("UTF8")); jdbc mj = new jdbc(); try { mj.insert(username, address); response.getWriter().println("寫入成功"); } catch (Exception e) { response.getWriter().print(e); } } }
doGet、doPost等方法會對應路徑“/saveUserInfo”的GET、POST的方法
8.編寫jdbc
我們上面用了一個jdbc.jdbc類的insert方法
package jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; public class jdbc { public void insert(String name, String address) throws Exception{ String url = "jdbc:mysql://localhost:3306/20171113"; String userName = "root"; String password = ""; Connection conn = DriverManager.getConnection(url,userName,password); String sql = "INSERT INTO user(username,address) VALUES(?,?)"; PreparedStatement ps = conn.prepareStatement(sql); ps.setString(1, name); ps.setString(2, address); ps.execute(); conn.close(); } }
這里值得一提的是：jdbc的mysql驅動（mysql-connector-java-x.x.x-bin）一定要加在jre\lib\ext下,因為此時已經運行在tomcat上脫離了eclipse，runtime的依賴包一定要到java的安裝目錄下獲取。
9.運行
項目右擊，run as --> run on server
保存后
數據庫也成功存入數據
