SpringMVC+Spring+Mybatis整合

時間  2020-01-18
標籤 springmvc+spring+mybatis springmvc spring mybatis 整合 欄目 MyBatis 简体版
原文   原文鏈接

建立web工程

用eclipse或idea建立一個web工程，在這裏演示使用idea，項目命名爲ssmhtml

創建工程目錄框架

根據習慣，簡歷包目錄，分別爲前端

  1. config
    在其中建立兩個子包mybatis和spring，分別用來放置spring、mybatis配置文件
  2. mapper
    用來放置mybatis的mapper接口和mapper.xml
  3. service
    service層的javabean
  4. controller
    controller的javabean
  5. pojo
    簡單的POJO類

這裏寫圖片描述

在WEB-INF下創建兩個目錄java

  1. lib
    jar包目錄
  2. views
    jsp視圖目錄

這裏寫圖片描述

導入jar包

一共須要以下jar包mysql

  1. spring全部包
  2. mybatis
  3. spring-mybatis整合包
  4. aspectj
  5. jstl
  6. log4j
  7. c3p0
  8. mysql

這裏寫圖片描述

百度雲下載 連接：http://pan.baidu.com/s/1dDB8cxV 密碼：3cqpweb

添加mybatis配置文件

在config.mybatis下建立mybatis.xml配置文件，SSM整合和mybatis在不須要二級緩存等配置時，mybatis配置文件只須要一個框架，不須要書寫具體內容，框架以下spring

<?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>


</configuration>

添加spring和springmvc配置文件

  • springmvc

在config.spring下建立springmvc.xml文件，用來配置springmvcsql

<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">


       <!--自動掃描controller 加入IOC容器-->
       <context:component-scan base-package="com.elin4it.ssm.controller"/>

       <!--配置映射器和適配器-->
       <mvc:annotation-driven></mvc:annotation-driven>

       <!--配置視圖渲染類-->
       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
              <!--配置物理解析路徑-->
              <property name="prefix" value="/WEB-INF/views/"/>
              <property name="suffix" value=".jsp"/>
       </bean>


</beans>
  • applicationContext-dao.xml

在config.spring下建立applicationContext-dao.xml文件，用來配置DAO層的內容，在這裏鏈接數據庫的數據源使用C3P0，因此在這以前先在config中添加db.properties來指定數據庫鏈接信息數據庫

jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://127.0.0.1:3306/mybatis?characterEncoding=UTF-8
jdbc.username = root
jdbc.password = root

applicationContext-dao.xml內容：apache

<?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" 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">

       <!--添加數據庫配置文件-->
       <context:property-placeholder location="classpath:com/elin4it/ssm/config/db.properties"/>

       <!--設置數據源c3p0-->
       <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
              <property name="driverClass" value="${jdbc.driver}"/>
              <property name="jdbcUrl" value="${jdbc.url}"/>
              <property name="user" value="${jdbc.username}"/>
              <property name="password" value="${jdbc.password}"/>
              <property name="maxPoolSize" value="50"/>
              <property name="minPoolSize" value="5"/>
              <property name="maxIdleTime" value="60"/>
       </bean>

       <!--配置sqlsessionFactory-->
       <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
              <!--配置mybatis配置文件-->
              <property name="configLocation" value="classpath:com/elin4it/ssm/config/mybaits/SqlMapConfig.xml"/>
              <!--配置數據源-->
              <property name="dataSource" ref="dataSource"/>
       </bean>

       <!--配置自動掃描mapper，將mapper接口加入到IOC容器-->
       <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
              <property name="basePackage" value="com/elin4it/ssm/mapper"/>
              <property name="sqlSessionFactoryBeanName" value="sqlSession"/>
       </bean>
</beans>
  • applicationContext-service.xml

在config.spring中添加applicationContext-service.xml，用來把service層的javabean注入到IOC容器中後端

<?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" 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">


       <!--將service加入到IOC容器-->
       <context:component-scan base-package="com.elin4it.ssm.service"/>
</beans>
  • applicationContext-transtion.xml

在config.spring中添加applicationContext-transtion.xml，用來配置AOP事務

<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

       <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
              <property name="dataSource" ref="dataSource"/>
       </bean>

       <tx:advice id="txAdvice" transaction-manager="transactionManager">
              <tx:attributes>
                     <tx:method name="find*" propagation="REQUIRED"/>
                     <tx:method name="add*" propagation="REQUIRED"/>
                     <tx:method name="delete*" propagation="REQUIRED"/>
                     <tx:method name="update*" propagation="REQUIRED"/>
              </tx:attributes>
       </tx:advice>

       <aop:config>
              <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.elin4it.ssm.service.*.*(..))"/>
       </aop:config>
</beans>

添加log4j配置文件

爲了方便mybatis的調試，使用log4j做爲日誌輸出，在src根目錄中添加log4j.properties

log4j.rootLogger=DEBUG,Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.org.apache=INFO

修改web.xml文件

web.xml須要實現三個功能

  • 配置spring文件
<!--設置spring 配置文件的位置-->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:cn/elinzhou/OrderSpringMVC/config/spring/applicationContext-*.xml</param-value>
</context-param>
<!--配置spring listener-->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
  • 配置springmvc中的前端控制器
<!--配置springmvc-->
<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <!--springmvc配置文件位置-->
        <param-value>classpath:cn/elinzhou/OrderSpringMVC/config/spring/springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
  • 解決post亂碼問題
<!--解決POST亂碼問題-->
<filter>
    <filter-name>CharacterEncodingFilter</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>
</filter>
<filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

建立pojo類

這裏使用一張用戶表作示例，表結構以下

DROP TABLE IF EXISTS `user`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `user` ( `id` int(11) NOT NULL auto_increment, `username` varchar(32) NOT NULL COMMENT '用戶名稱', `sex` char(1) default NULL COMMENT '性別', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=31 DEFAULT CHARSET=utf8;

根據表結構創建POJO類

package cn.elinzhou.OrderSpringMVC.pojo;

import java.util.Date;

public class User {
    private Integer id;

    private String username;

    private String sex;

    public Integer getId() {
        return id;
    }

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

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username == null ? null : username.trim();
    }
    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex == null ? null : sex.trim();
    }
}

建立mapper接口和mapper.xml

mapper.java

package com.elin4it.ssm.mapper;

import com.elin4it.ssm.pojo.User;
import java.util.List;

public interface UserMapper {
    //查詢用戶列表
    List<User> findUser() throws Exception;
}

mapper.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="com.elin4it.ssm.mapper.UserMapper" >
  <select id="findUser" resultMap="com.elin4it.ssm.pojo.User">
    select
    id, username, birthday, sex, address
    from user
  </select>

</mapper>

建立service接口和實現

建立一個service接口，添加一個方法，用來查詢所用用戶
UserService.java

package com.elin4it.ssm.service;

import com.elin4it.ssm.pojo.User;

import java.util.List;

/** * Created by elin on 15-7-1. */
public interface UserService {
    List<User> findUser()throws Exception;
}

添加UserService的實現類UserServiceImpl.java

package com.elin4it.ssm.service;

import com.elin4it.ssm.mapper.UserMapper;
import com.elin4it.ssm.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/** * Description: UserServiceImpl * Author: Elin Zhou * Create: 2015-07-01 20:59 */
@Service
public class UserServiceImpl implements UserService {

    //自動注入mapper接口
    @Autowired
    private UserMapper userMapper;


    @Override
    public List<User> findUser() throws Exception {
        //調用mapper接口中的方法，獲取用戶列表
        List<User> users = userMapper.findUser();
        return users;
    }
}

建立controller

建立後端控制器，前端控制器根據用戶請求映射到後端控制器中的方法，而且返回視圖和數據來渲染視圖

package com.elin4it.ssm.controller;

import com.elin4it.ssm.pojo.User;
import com.elin4it.ssm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;
import java.util.Map;

/** * Description: UserController * Author: Elin Zhou * Create: 2015-07-01 19:30 */
@Controller
@RequestMapping("/user")
public class UserController {
    //自動注入service   
    @Autowired
    private UserService userService;

    @RequestMapping("/findUser")
    public String findUser(Map<String,Object> map) throws Exception{
    //調用service中的查詢用戶列表方法來獲取用戶列表
        List<User> users = userService.findUser();
        //把用戶列表放到形參傳入的map中，至關於執行request.addAttribute()方法
        map.put("users",users);

        return "user/userList";
    }
}

建立對應的jsp頁面

在WEB-INF的views文件夾中添加user文件加，用來存放用戶相關的視圖，在添加一個userList.jsp文件

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%-- Created by IntelliJ IDEA. User: elin Date: 15-7-1 Time: 下午8:53 To change this template use File | Settings | File Templates. --%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>
  <h1>userList</h1>
  <table>
    <tr><td>id</td><td>username</td><td>sex</td></tr>
    <c:forEach items="${users}" var="i">
      <tr>
        <td>${i.id}</td>
        <td>${i.username}</td>
        <td>${i.sex}</td>
      </tr>
    </c:forEach>
  </table>
</body>
</html>
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