Eclipse下用Maven搭建SpringMvc+MyBatis

一、工欲善其事，必先利器。

利器：①Eclipse（安装好spring的STS工具，安装好Maven）

②得连接数据库测试一下，需要安装好MySQL，Navicat

二、开搞

（1）用maven新建一个web工程

File —>New —> Maven Project







项目目录结构：



配置成byn-web工程：右击项目名称—>Properties



改成你自己安装的JDK版本



注意：先去掉这个勾，点apply，然后右击项目名称—>Properties回到这里把dyn-web-module改成3.0


设置src/main/webapp为工程的根目录









到这一步，一个maven的动态web改成就基本完工了。目录结构变为：



（这个有个叉叉不要管，jsp这个文件内容去掉重写就没有了。）

（2）搭springMVC+MyBatis框架

maven导入jar包方法



加完后，右击pom.xml—>Run as —>maven install

jar包位置：



（3）Java代码

model:

package com.demo.model;

public class User {

private Integer id;
private String name;
private String nickname;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
public User(Integer id, String name, String nickname) {
super();
this.id = id;
this.name = name;
this.nickname = nickname;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", nickname=" + nickname
+ "]";
}

}

DAO:

package com.demo.dao;

import com.demo.model.User;

public interface UserDAO {

User selectUserById(Integer id);
}

service:

package com.demo.service;

import com.demo.model.User;

public interface UserService {

User selectUserById(Integer id);

}

serviceImpl:

package com.demo.serviceImpl;

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

import com.demo.dao.UserDAO;
import com.demo.model.User;
import com.demo.service.UserService;

@Service
public class UserServiceImpl implements UserService {

@Autowired
private UserDAO userDao;

@Override
public User selectUserById(Integer id) {
// TODO Auto-generated method stub
return userDao.selectUserById(id);
}

}

controller:

package com.demo.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.demo.model.User;
import com.demo.serviceImpl.UserServiceImpl;

@Controller
@RequestMapping("/test")
public class UserController {

@Autowired
private UserServiceImpl userService;

@RequestMapping("/selectUserById")
@ResponseBody
public User selectUserById(HttpServletRequest request,HttpServletResponse response){
Integer id = Integer.parseInt(request.getParameter("id"));
return userService.selectUserById(id);
}

}

（4）配置文件



下面是配置文件代码：

jdbc.properties（数据库文件）

jdbc_driverClassName=com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
jdbc_username=root
jdbc_password=root

log4j.properties（日志文件）

### set log levels ###
#log4j.rootLogger = debug , stdout , D , E
log4j.rootLogger = debug , stdout , D

###  output to the console ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
#log4j.appender.stdout.layout.ConversionPattern = %d{ABSOLUTE} %5p %c{ 1 }:%L - %m%n
log4j.appender.stdout.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n

### Output to the log file ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ${springmvc.root}/WEB-INF/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n

### Save exception information to separate file ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ${springmvc.root}/WEB-INF/error.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = ERROR
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n

mybatis-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>
<typeAliases>
<typeAlias alias="User" type="com.demo.model.User"/>
</typeAliases>

<mappers>

</mappers>

</configuration>

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
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-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> 
<!-- 扫描controller，注入controller -->
<context:component-scan base-package="com.demo"/>

<!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>

<!-- 启动springMVC注解功能，完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>

<!-- 添加视图转换器，对视图模型添加前后缀 -->
<bean name="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="mediaTypes">
<map>
<entry key="json" value="application/json"/>
</map>
</property>
</bean>

</beans>

spring-mybatis.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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd"> 
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"
destroy-method="close" >
<property name="driverClassName">
<value>${jdbc_driverClassName}</value>
</property>
<property name="url">
<value>${jdbc_url}</value>
</property>
<property name="username">
<value>${jdbc_username}</value>
</property>
<property name="password">
<value>${jdbc_password}</value>
</property>
<!-- 连接池最大使用连接数 -->
<property name="maxActive">
<value>20</value>
</property>
<!-- 初始化连接大小 -->
<property name="initialSize">
<value>1</value>
</property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait">
<value>60000</value>
</property>
<!-- 连接池最大空闲 -->
<property name="maxIdle">
<value>20</value>
</property>
<!-- 连接池最小空闲 -->
<property name="minIdle">
<value>3</value>
</property>
<!-- 自动清除无用连接 -->
<property name="removeAbandoned">
<value>true</value>
</property>
<!-- 清除无用连接的等待时间 -->
<property name="removeAbandonedTimeout">
<value>180</value>
</property>
<!-- 连接属性 -->
<property name="connectionProperties">
<value>clientEncoding=UTF-8</value>
</property>
</bean>

<!-- mybatis文件配置，扫描所有mapper文件 -->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean"
p:dataSource-ref="dataSource"
p:configLocation="classpath:conf/mybatis-config.xml"
p:mapperLocations="classpath:mapper/*.xml"></bean>

<!-- spring与mybatis整合配置，扫描所有dao -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"
p:basePackage="com.demo.dao"
p:sqlSessionFactoryBeanName="sqlSessionFactory"/>

<!-- 对数据源进行事务管理 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource"/>

</beans>

spring.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"
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-4.1.xsd"> 
<!-- 引入JDBC配置文件 -->
<context:property-placeholder location="classpath:conf/jdbc.properties"/>

<!-- 扫描文件，自动将service层注入 -->
<context:component-scan base-package="com.demo.serviceImpl"></context:component-scan>

</beans>

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="com.demo.dao.UserDAO">

<!-- 根据ID查找User -->
<select id="selectUserById" parameterType="int" resultType="User">
select * from user where id=#{id}
</select>

</mapper>

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/j2ee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
<display-name>Archetype Created Web Application</display-name>
<!-- 读取spring配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:conf/spring.xml,classpath:conf/spring-mybatis.xml</param-value>
</context-param>
<!-- 设计路径变量值 -->
<context-param>
<param-name>webAppRootKey</param-name>
<param-value>springmvc.root</param-value>
</context-param>
<!-- Spring字符集过滤器 -->
<filter>
<filter-name>SpringEncodingFilter</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>SpringEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 日志记录 -->
<context-param>
<!-- 日志配置文件路径 -->
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:conf/log4j.properties</param-value>
</context-param>

<context-param>
<!-- 日志页面的刷新间隔 -->
<param-name>log4jRefreshInterval</param-name>
<param-value>6000</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- springMVC核心配置 -->

<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:conf/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>

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

（5）发布到tomcat，打开浏览器输入：http://localhost:8080/mavenspringmvcmybatis-demo/test/selectUserById.do?id=1



（我这里测试是从数据库返回一个json串。通过配置文件把返回数据转成json格式，详见spring-mvc.xml）