Java知识总结---整合SpringMVC+Mybatis+Spring（二）

在如今的Java Web开发过程中，各种各样框架层出不穷。在工作中，框架的使用也越来越频繁。

今天介绍一下如今比較流行的SpringMVC、Mybatis和Spring框架。学习一下怎样在项目中使用它们。本次项目的创建使用maven来完毕。

1、使用maven创建web项目。选择Maven Project，catalogs选择webapps，输入groupId,artifactId,完毕就可以。

2、在pom.xml中引入相关的依赖：

 <properties>
  	<spring.version>3.2.12.RELEASE</spring.version>
  </properties>
  <dependencies>
  	<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.10</version>
      <scope>test</scope>
    </dependency>
     <dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>servlet-api</artifactId>
		<version>2.4</version>
	</dependency>
	
         <!-- spring依赖 -->
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-core</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-beans</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		 <groupId>org.springframework</groupId>
  		 <artifactId>spring-tx</artifactId>
  		 <version>${spring.version}</version>
	</dependency>
	
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-aop</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-aspects</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
  		<artifactId>spring-context</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
  		<artifactId>spring-context-support</artifactId>
  		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-jdbc</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-webmvc</artifactId>
		<version>${spring.version}</version>
	</dependency>
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-test</artifactId>
		<version>${spring.version}</version>
	</dependency>
	
        <!-- mybatis依赖 -->
	<dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.2.7</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.2.2</version>
    </dependency>
    
    <!-- mysql驱动 -->
    <dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>5.1.5</version>
	</dependency>
	
        <!-- jsp相关依赖 -->
	<dependency>
		<groupId>jstl</groupId>
		<artifactId>jstl</artifactId>
		<version>1.2</version>
	</dependency>
	<dependency>
		<groupId>taglibs</groupId>
		<artifactId>standard</artifactId>
		<version>1.1.2</version>
	</dependency>
	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>jsp-api</artifactId>
		<version>2.0</version>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>servlet-api</artifactId>
		<version>2.5</version>
		<scope>test</scope>
	</dependency>

  </dependencies>

2、创建spring配置文件

      在src下创建applicationContext.xml，内容临时为空。

3、在web.xml中引入spring

      在web.xml中加入例如以下内容：

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

4、添加spring-mvc配置

      在WEB-INF下添加spring-servlet.xml文件，内容例如以下。

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
			http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
			http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">

	<context:component-scan base-package="com.demo.controller" />
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />  

	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/WEB-INF/page/" />
		<property name="suffix" value=".jsp" />
	</bean> 
	
</beans>

在web.xml中引入例如以下内容：

<servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

在此处要特别注意：servlet-name假设是spring。则springmvc的配置文件就必须是spring-servlet.xml

5、mybatis配置

在src下创建mybatis的配置文件mybatis-config.xml，内容例如以下：

<?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> 
	<settings>
		<setting name="cacheEnabled" value="true" />
		<setting name="lazyLoadingEnabled" value="false" />
		<setting name="defaultStatementTimeout" value="30" />
	</settings>
	
    <mappers> 
        <mapper resource="mybatis/UserMapper.xml" /> 
    </mappers> 
</configuration>

在applicationContext.xml文件里配置mybatis：

<?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">
           
 	<context:property-placeholder location="classpath:jdbc.properties"/>
 	<context:component-scan base-package="com.demo" />

	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
	    <property name="driverClassName" value="${jdbc.driverClassName}" /> 
	    <property name="url" value="${jdbc.url}" /> 
	    <property name="username" value="${jdbc.username}"></property>
      	<property name="password" value="${jdbc.password}"></property>
	</bean> 
	 
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 
	    <property name="dataSource" ref="dataSource" /> 
	</bean> 
	 
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 
	    <property name="configLocation" value="classpath:mybatis-config.xml" /> 
	    <property name="dataSource" ref="dataSource" /> 
	</bean>

当中jdbc.properties文件也在src下：

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost/test
jdbc.username=root
jdbc.password=root

6、创建model、dao、service

UserModel：

package com.demo.model;

public class UserModel {
	private int id;
	private String name;
	private int age;
	private String address;
	
	//get set方法
}

UserDaoImpl:

package com.demo.dao.impl;

import java.util.List;

import org.mybatis.spring.support.SqlSessionDaoSupport;

import com.demo.dao.UserDao;
import com.demo.model.UserModel;

public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {

	public boolean insert(UserModel user) {
		int count = getSqlSession().insert("insertUser", user);
		if(count > 0) {
			return true;
		}
		return false;
	}

	public boolean update(UserModel user) {
		return true;
	}

	public boolean delete(String userid) {
		return true;
	}

	public UserModel getUser(int userid) {
		List<UserModel> list = getSqlSession().selectList("selectUserById", userid);
		return list != null && list.size() > 0  ? list.get(0) : null; 
	}

	public List<UserModel> getAllUser() {
		// TODO Auto-generated method stub
		return null;
	}

}

UserServiceImpl:

package com.demo.service.impl;

import org.springframework.beans.factory.annotation.Autowired;

import com.demo.dao.UserDao;
import com.demo.model.UserModel;
import com.demo.service.UserService;

public class UserServiceImpl implements UserService {

	@Autowired
	private UserDao userDao;
	
	public boolean insertUser(UserModel user) {
		return userDao.insert(user);
	}

}

UserController:

package com.demo.controller;

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 com.demo.model.UserModel;
import com.demo.service.UserService;

@Controller
@RequestMapping("/user/")
public class UserController {
	@Autowired
	private UserService userService;
	
	@RequestMapping("addUser.do")
	public String addUser() {
		return "addUser";
	}
	
	@RequestMapping("saveUser.do")
	public ModelAndView saveUser(UserModel userModel) {
		ModelAndView mv = new ModelAndView();
		boolean b = userService.insertUser(userModel);
		if(b) {
			mv.setViewName("addUserSuccess");
		} else {
			mv.setViewName("addUserFail");
		}
		return mv;
	}
}

在applicationContext.xml中配置UserDao和UserService:

<bean id="userDao" class="com.demo.dao.impl.UserDaoImpl">
		<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
	</bean>
	<bean id="userService" class="com.demo.service.impl.UserServiceImpl" />

在src/mybatis下创建User相关的数据库操作：

<?
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="user">
	
	<resultMap type="com.demo.model.UserModel" id="UserModel">
		<result column="id" property="id" jdbcType="INTEGER"/>
		<result column="name" property="name" jdbcType="VARCHAR"/>
		<result column="age" property="age" jdbcType="INTEGER"/>
		<result column="address" property="address" jdbcType="VARCHAR"/>
		
	</resultMap>
	
	<insert id="insertUser" parameterType="com.demo.model.UserModel">
		insert into t_user(`name`,`age`,`address`) values(
			#{name,jdbcType=VARCHAR},
			#{age,jdbcType=INTEGER},
			#{address,jdbcType=VARCHAR}
		);
	</insert>
	
	<select id="selectUserById" parameterType="INTEGER" resultMap="UserModel">
		select `id`,`name`,`age`,`address` from t_user 
		where `id` = #{userid,jdbcType=INTEGER};
	</select>
	
	<select id="selectAllUser" resultType="com.demo.model.UserModel">
		select `id`,`name`,`age`,`address` from t_user
	</select>
</mapper>

7、前台页面：

在WEB-INF/page下创建页面。该路径在sprng-servlet.xml中。

addUser.jsp内容例如以下：

<form action="${pageContext.request.contextPath }/user/saveUser.do">
		<table>
			<tr>
				<td>姓名</td>
				<td><input type="text" name="name" /></td>
			</tr>
			<tr>
				<td>年龄</td>
				<td><input type="text" name="age" /></td>
			</tr>
			<tr>
				<td>地址</td>
				<td><input type="text" name="address" /></td>
			</tr>
			<tr>
				<td colspan="2">
					<input type="submit" value="提交" />
				</td>
			</tr>
		</table>

8、启动项目后，通过index.jsp訪问user/addUser.do进入addUser.jsp。输入信息点击提交。将信息插入到数据库，成功后。跳转至addSuccess.jsp