IDEA搭建SpringMVC+Mybatis+Mysql+Maven框架

相關環境

• Intellij IDEA Ultimate
• Tomcat
• JDK
• MySql 5.6（win32/win64）
• Maven （可使用Intellij IDEA自帶的）

搭建步驟

創建項目工程

1、創建工程，選擇Maven

2、填寫項目信息

初始化配置

1、Maven配置
先說Maven的項目依賴配置文件pom.xml，我們進入mvn repository 查找需要搜索的包結果如圖：

點擊進入第一個搜索結果，然后各種版本

點擊所需版本。如圖：

里面的dependency即為所需標簽。

總的配置文件pom.xml添加依賴包信息如下：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>SSMTestProject</groupId>
  <artifactId>SSMTestProject</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>SSMTestProject Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.7.2</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-jpa</artifactId>
      <version>1.9.4.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.hibernate.javax.persistence</groupId>
      <artifactId>hibernate-jpa-2.0-api</artifactId>
      <version>1.0.1.Final</version>
    </dependency>
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-entitymanager</artifactId>
      <version>5.1.0.Final</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>
    <dependency>
      <groupId>org.json</groupId>
      <artifactId>json</artifactId>
      <version>20160212</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.7.2</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.7.2</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.3.1</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.4</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>SSMTestProject</finalName>
  </build>
</project>

2、web配置

web.xml配置添加如下信息：

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>SSMTestProject</display-name>
  <servlet>
    <servlet-name>myspring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>myspring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

使用spring框架的默認DispatcherSerlet。load-on-starup標簽表示servlet的啟用時間，servlet-name指定了serevlet配置文件myspring。url -pattern是指所有路徑均會被該servlet攔截。而filter一句是防止中文亂碼，啟用uft-8。

配置Servlet myspring-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--指明 controller 所在包，並掃描其中的注解-->
    <context:component-scan base-package="com.ssm.controller"/>

    <!-- 靜態資源(js、image等)的訪問 -->
    <mvc:default-servlet-handler/>

    <!-- 開啟注解 -->
    <mvc:annotation-driven/>

    <!--ViewResolver 視圖解析器-->
    <!--用於支持Servlet、JSP視圖解析-->
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

log4j.xml 配置文件如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
  <!--
    - This is a sample configuration for log4j.
    - It simply just logs everything into a single log file.
    - Note, that you can use properties for value substitution.
    -->
  <appender name="CORE" class="org.apache.log4j.FileAppender">
    <param name="File"   value="${org.apache.cocoon.work.directory}/cocoon-logs/log4j.log" />
    <param name="Append" value="false" />
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d %-5p %t %c - %m%n"/>
    </layout>
  </appender>

  <root>
    <priority value="${org.apache.cocoon.log4j.loglevel}"/>
    <appender-ref ref="CORE"/>
  </root>
</log4j:configuration>

3、mybatis配置
可以使用注解或者xml的方式配置sql操作，這里使用注解方式：

// config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!-- development:開發模式     work:工作模式 -->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/ssm" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>

    <!--<mappers>
        <mapper resource="userMapper.xml" />
    </mappers>-->
    <mappers>
        <mapper class="com.ssm.Mapper.UserMapper"/>
    </mappers>

</configuration>

使用xml方式：

// userMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="userMapper">
    <!--根據ID獲取對應的值  -->
    <select id="findUserById" parameterType="int" resultType="com.ssm.model.User">
        select * from user where id = #{id}
    </select>
    <insert id="addUser" parameterType="com.ssm.model.User">
        insert into user(username,password) values(#{username},#{password})
    </insert>
</mapper>

Java類

在main文件夾下創建文件夾java，點擊右鍵將java作為source文件夾：

Controller

// MainController.java
package com.ssm.controller;

import com.ssm.model.User;
import com.ssm.service.IUserService;
import com.ssm.service.UserServiceImpl;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class MainController {

    private IUserService service = new UserServiceImpl();

    @RequestMapping(value = "/hello", method = RequestMethod.GET)
    public String index(User user) {
        return "index";
    }
    @RequestMapping(value="/nice",method = RequestMethod.GET)
    @ResponseBody
    public List<User> nice(Model model){
        return service.getAllUsers();
    }

    @RequestMapping(value ="/toJson",method=RequestMethod.POST)
    @ResponseBody
    public User toJson(User user){
        service.addUser(user); //一起測試了
        return service.findUserById(2);
    }
}

DAO

// IUserDao.java
package com.ssm.Dao;

import com.ssm.model.User;

import java.util.List;

public interface IUserDao {
    public User findUserById(int id); //查詢
    public void addUser(User user); //添加
    public List<User> getAllUsers();
}

// UserDaoImpl.java
package com.ssm.Dao;

import com.ssm.Mapper.UserMapper;
import com.ssm.model.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.Reader;
import java.util.List;

public class UserDaoImpl implements IUserDao{
    private SqlSessionFactory sessionFactory;
    private SqlSession session;
    private UserMapper mapper;
    public UserDaoImpl() {
        String resource = "config.xml";
//        try {
//            Reader reader = Resources.getResourceAsReader(resource);
//            sessionFactory = new SqlSessionFactoryBuilder().build(reader);
//            session = sessionFactory.openSession();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
        try {
            Reader reader = Resources.getResourceAsReader(resource);
            sessionFactory = new SqlSessionFactoryBuilder().build(reader);
            session = sessionFactory.openSession();
            mapper = session.getMapper(UserMapper.class);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public User findUserById(int id) {
//        String statement = "userMapper.findUserById";
//        User user = (User)session.selectOne(statement, 1);
//        return user;
        return mapper.findUserById(id);
    }
    public void addUser(User user) {
//        String statement = "userMapper.addUser";
//        session.insert(statement, user);
//        session.commit();  //一定要記得commit
        mapper.addUser(user);
        session.commit();
    }

    public List<User> getAllUsers() {
        return mapper.getAllUsers();
    }
}

Mapper

// UserMapper.java
package com.ssm.Mapper;

import com.ssm.model.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface UserMapper {
    @Select("select * from user where id = #{id}")
    User findUserById(int id);

    @Insert("insert into user(username,password) values(#{username},#{password})")
    void addUser(User user);

    @Select("select * from user")
    List<User> getAllUsers();

}

Model

// User.java
package com.ssm.model;

public class User {
    private String username;
    private String password;
    private int id;


    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 User(String username, String password, int id) {
        this.username = username;
        this.password = password;
        this.id = id;
    }

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public User() {
    }
}

service

// IUserService.java
package com.ssm.service;

import com.ssm.model.User;

import java.util.List;

public interface IUserService {
    public User findUserById(int id);
    public void addUser(User user);
    public List<User> getAllUsers();
}

// UserServiceImpl.java
package com.ssm.service;

import com.ssm.Dao.IUserDao;
import com.ssm.Dao.UserDaoImpl;
import com.ssm.model.User;

import java.util.List;

public class UserServiceImpl implements IUserService {
    private IUserDao userDao;

    public UserServiceImpl() {
        userDao = new UserDaoImpl();
    }

    public User findUserById(int id) {
        return userDao.findUserById(id);
    }
    public void addUser(User user){
        userDao.addUser(user);
    }

    public List<User> getAllUsers() {
        return userDao.getAllUsers();
    }
}

JSP

// index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="sf" uri="http://www.springframework.org/tags/form" %>
<html>
<body>
<h2>Hello World!</h2>
<sf:form method="post" modelAttribute="user" action="/toJson">
  用戶名:<sf:input path="username"/>
  密碼:<sf:password path="password"/>
  <input type="submit" value="提交">
</sf:form>
</body>
</html>

// nice.jsp
<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2017/10/9
  Time: 8:01
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <title>nice to meet you!</title>
</head>
<body>
<br/>
<div>
  ${result}
</div>

</body>
</html>

工程整體結構

數據庫腳本

// ssm.sql
/*
Navicat MySQL Data Transfer

Source Server         : localhost
Source Server Version : 50554
Source Host           : localhost:3306
Source Database       : ssm

Target Server Type    : MYSQL
Target Server Version : 50554
File Encoding         : 65001

Date: 2017-10-22 18:19:30
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) NOT NULL,
  `password` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', 'guo', '111');
INSERT INTO `user` VALUES ('2', 'root', 'aaa');
INSERT INTO `user` VALUES ('3', '11111', '22222');