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idea 下筹建springMvc + mybatis+Maven

热度:577   发布时间:2016-05-02 03:12:53.0
idea 下搭建springMvc + mybatis+Maven

刚开始使用idea,发现idea与myEclipse差别还是很大的,从搭建的简单的SpringMvc开始,一路遇到种种困难。本文讲诉idea搭建springMvc + mybatis+Maven,环境;希望给新手带来帮助。

1、基本概念

1.1、Spring

    Spring是一个开源框架,Spring是于2003 年兴起的一个轻量级的Java 开发框架,由Rod Johnson 在其著作Expert One-On-One J2EE Development and Design中阐述的部分理念和原型衍生而来。它是为了解决企业应用开发的复杂性而创建的。Spring使用基本的JavaBean来完成以前只可能由EJB完成的事情。然而,Spring的用途不仅限于服务器端的开发。从简单性、可测试性和松耦合的角度而言,任何Java应用都可以从Spring中受益。 简单来说,Spring是一个轻量级的控制反转(IoC)和面向切面(AOP)的容器框架。

1.2、SpringMVC

    Spring MVC属于SpringFrameWork的后续产品,已经融合在Spring Web Flow里面。Spring MVC 分离了控制器、模型对象、分派器以及处理程序对象的角色,这种分离让它们更容易进行定制。

1.3、MyBatis

   MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code,并且改名为MyBatis 。MyBatis是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects(DAO)MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射,将接口和 Java 的POJOs(Plain Old Java Objects,普通的 Java对象)映射成数据库中的记录。

2、开发环境搭建与Maven Web项目创建
如果需要,参看大神的博文:http://blog.csdn.net/xxb2008/article/details/8772634

3.SSM整合

3.1Maven引入需要的JAR包
<properties>    <spring.version>4.0.3.RELEASE</spring.version>    <!-- mybatis版本号 -->    <mybatis.version>3.2.6</mybatis.version>    <!-- log4j日志文件管理包版本 -->    <slf4j.version>1.7.7</slf4j.version>    <log4j.version>1.2.17</log4j.version>  </properties>  <dependencies>    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>4.0</version>      <scope>test</scope>    </dependency>    <!-- spring核心包 -->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-core</artifactId>      <version>${spring.version}</version>    </dependency>    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-web</artifactId>      <version>${spring.version}</version>    </dependency>    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-oxm</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-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-aop</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-test</artifactId>      <version>${spring.version}</version>    </dependency>    <!-- mybatis核心包 -->    <dependency>      <groupId>org.mybatis</groupId>      <artifactId>mybatis</artifactId>      <version>${mybatis.version}</version>    </dependency>    <!-- mybatis/spring包 -->    <dependency>      <groupId>org.mybatis</groupId>      <artifactId>mybatis-spring</artifactId>      <version>1.2.2</version>    </dependency>    <!-- 导入java ee jar 包 -->    <dependency>      <groupId>javax</groupId>      <artifactId>javaee-api</artifactId>      <version>7.0</version>    </dependency>    <!-- 导入Mysql数据库链接jar包 -->    <dependency>      <groupId>mysql</groupId>      <artifactId>mysql-connector-java</artifactId>      <version>5.1.30</version>    </dependency>    <!-- 导入dbcp的jar包,用来在applicationContext.xml中配置数据库 -->    <dependency>      <groupId>commons-dbcp</groupId>      <artifactId>commons-dbcp</artifactId>      <version>1.4</version>    </dependency>    <!-- JSTL标签类 -->    <dependency>      <groupId>jstl</groupId>      <artifactId>jstl</artifactId>      <version>1.2</version>    </dependency>    <!-- 日志文件管理包 -->    <!-- log start -->    <dependency>      <groupId>log4j</groupId>      <artifactId>log4j</artifactId>      <version>${log4j.version}</version>    </dependency>    <!-- 格式化对象,方便输出日志 -->    <dependency>      <groupId>com.alibaba</groupId>      <artifactId>fastjson</artifactId>      <version>1.1.41</version>    </dependency>    <dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-api</artifactId>      <version>${slf4j.version}</version>    </dependency>    <dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-log4j12</artifactId>      <version>${slf4j.version}</version>    </dependency>    <!-- log end -->    <!-- 映入JSON -->    <dependency>      <groupId>org.codehaus.jackson</groupId>      <artifactId>jackson-mapper-asl</artifactId>      <version>1.9.13</version>    </dependency>    <!-- 上传组件包 -->    <dependency>      <groupId>commons-fileupload</groupId>      <artifactId>commons-fileupload</artifactId>      <version>1.3.1</version>    </dependency>    <dependency>      <groupId>commons-io</groupId>      <artifactId>commons-io</artifactId>      <version>2.4</version>    </dependency>    <dependency>      <groupId>commons-codec</groupId>      <artifactId>commons-codec</artifactId>      <version>1.9</version>    </dependency>  </dependencies>
3.2建立JDBC属性文件
driver=com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306/testusername=rootpassword=root#定义初始连接数initialSize=0#定义最大连接数maxActive=20#定义最大空闲maxIdle=20#定义最小空闲minIdle=1#定义最长等待时间maxWait=60000

·3.3建立spring-mybatis.xml配置文件

<?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:mybatis="http://mybatis.org/schema/mybatis-spring"       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://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">    <!-- 自动扫描 -->    <context:component-scan base-package="com.wangjie.spring" />    <!-- 引入配置文件 -->    <bean id="propertyConfigurer"          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="location" value="classpath:jdbc.properties" />    </bean>    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"          destroy-method="close">        <property name="driverClassName" value="${driver}" />        <property name="url" value="${url}" />        <property name="username" value="${username}" />        <property name="password" value="${password}" />        <!-- 初始化连接大小 -->        <property name="initialSize" value="${initialSize}"></property>        <!-- 连接池最大数量 -->        <property name="maxActive" value="${maxActive}"></property>        <!-- 连接池最大空闲 -->        <property name="maxIdle" value="${maxIdle}"></property>        <!-- 连接池最小空闲 -->        <property name="minIdle" value="${minIdle}"></property>        <!-- 获取连接最大等待时间 -->        <property name="maxWait" value="${maxWait}"></property>    </bean>    <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource" />        <!-- 自动扫描mapping.xml文件 -->        <property name="mapperLocations" value="classpath:mapping/*.xml"></property>    </bean>    <!-- DAO接口所在包名,Spring会自动查找其下的类 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="com.wangjie.spring.dao" />        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>    </bean>    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->    <bean id="transactionManager"          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource" />    </bean></beans>
·3.4Log4j的配置
log4j.rootLogger=INFO,Console,File#定义日志输出目的地为控制台log4j.appender.Console=org.apache.log4j.ConsoleAppenderlog4j.appender.Console.Target=System.out#可以灵活地指定日志输出格式,下面一行是指定具体的格式log4j.appender.Console.layout = org.apache.log4j.PatternLayoutlog4j.appender.Console.layout.ConversionPattern=[%c] - %m%n#文件大小到达指定尺寸的时候产生一个新的文件log4j.appender.File = org.apache.log4j.RollingFileAppender#指定输出目录log4j.appender.File.File = logs/SpringMVC.log#定义文件最大大小log4j.appender.File.MaxFileSize = 10MB# 输出所以日志,如果换成DEBUG表示输出DEBUG以上级别日志log4j.appender.File.Threshold = ALLlog4j.appender.File.layout = org.apache.log4j.PatternLayoutlog4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
3.5JUnit测试在此之前我们需要新建张表
DROP TABLE IF EXISTS `t_user`;CREATE TABLE `t_user` (  `id` int(11) NOT NULL AUTO_INCREMENT,  `username` varchar(32) DEFAULT NULL,  `password` varchar(32) DEFAULT NULL,  PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;-- ------------------------------ Records of t_user-- ----------------------------INSERT INTO `t_user` VALUES ('2', 'tom', '123456');INSERT INTO `t_user` VALUES ('3', 'rose', '123456');INSERT INTO `t_user` VALUES ('4', 'aa', '123456');
3.6利用MyBatis Generator自动创建代码    ![这里写图片描述](http://img.blog.csdn.net/20160420151812340)    a.生成配置文件
<?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE generatorConfiguration    PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"    "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">  <generatorConfiguration>  <!-- 数据库驱动-->      <classPathEntry  location="mysql-connector-java-5.0.6-bin.jar"/>      <context id="DB2Tables"  targetRuntime="MyBatis3">          <commentGenerator>              <property name="suppressDate" value="true"/>              <!-- 是否去除自动生成的注释 true:是 : false:否 -->              <property name="suppressAllComments" value="true"/>          </commentGenerator>          <!--数据库链接URL,用户名、密码 -->          <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/test" userId="root" password="root">          </jdbcConnection>          <javaTypeResolver>              <property name="forceBigDecimals" value="false"/>          </javaTypeResolver>          <!-- 生成模型的包名和位置-->          <javaModelGenerator targetPackage="com.wangjie.spring.model" targetProject="src">              <property name="enableSubPackages" value="true"/>              <property name="trimStrings" value="true"/>          </javaModelGenerator>          <!-- 生成映射文件的包名和位置-->          <sqlMapGenerator targetPackage="mapping" targetProject="src">              <property name="enableSubPackages" value="true"/>          </sqlMapGenerator>          <!-- 生成DAO的包名和位置-->          <javaClientGenerator type="XMLMAPPER" targetPackage="com.wangjie.spring.dao" targetProject="src">              <property name="enableSubPackages" value="true"/>          </javaClientGenerator>          <!-- 要生成哪些表-->          <table tableName="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">        </table>    </context>  </generatorConfiguration>  

b.cmd进入该目录下执行:

java -jar mybatis-generator-core-1.3.2.jar -configfile generatorConfig.xml -overwrite

这里写图片描述
c.将生成的java文件放入项目中
这里写图片描述
3.7建立Service接口和实现类

a.UserService 
package com.wangjie.spring.service;import com.wangjie.spring.model.User;/** * Created by wangjie on 2016/4/19 0019. */public interface UserService {    User getUserById(int userId);}
b.UserServiceImpl 
package com.wangjie.spring.service.impl;import com.wangjie.spring.dao.UserMapper;import com.wangjie.spring.model.User;import com.wangjie.spring.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import javax.annotation.Resource;/** * Created by wangjie on 2016/4/19 0019. */@Service("userService")public class UserServiceImpl implements UserService {    @Resource    private UserMapper userMapper;    public User getUserById(int userId) {        return this.userMapper.selectByPrimaryKey(userId);    }}

3.8建立测试类
测试类在src/test/java中建立,下面测试类中注释掉的部分是不使用Spring时,一般情况下的一种测试方法;如果使用了Spring那么就可以使用注解的方式来引入配置文件和类,然后再将service接口对象注入,就可以进行测试了。
如果测试成功,表示Spring和Mybatis已经整合成功了。输出信息使用的是Log4j打印到控制台。

package test.java;import javax.annotation.Resource;import com.wangjie.spring.model.User;import com.wangjie.spring.service.UserService;import org.apache.log4j.Logger;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.alibaba.fastjson.JSON;@RunWith(SpringJUnit4ClassRunner.class) // 表示继承了SpringJUnit4ClassRunner类@ContextConfiguration(locations = { "classpath:spring-mybatis.xml" })public class TestMyBatis {    private static Logger logger = Logger.getLogger(TestMyBatis.class);    @Resource    private UserService userService;    @Test    public void test() {        User user = userService.getUserById(2);        logger.info(JSON.toJSONString(user));    }}

测试结果:
这里写图片描述
至此,完成Spring和mybatis这两大框架的整合,下面在继续进行SpringMVC的整合。
3.9整合SpringMVC
上面已经完成了2大框架的整合,SpringMVC的配置文件单独放,然后在web.xml中配置整合。

4.0配置spring-mvc.xml
配置里面的注释也很详细,在此就不说了,主要是自动扫描控制器,视图模式,注解的启动这三个。

<?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:p="http://www.springframework.org/schema/p"       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-3.1.xsd                        http://www.springframework.org/schema/context                        http://www.springframework.org/schema/context/spring-context-3.1.xsd                        http://www.springframework.org/schema/mvc                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">    <!-- 自动扫描该包,[email protected] -->    <context:component-scan base-package="com.wangjie.spring.controller" />    <!--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.MappingJacksonHttpMessageConverter">        <property name="supportedMediaTypes">            <list>                <value>text/html;charset=UTF-8</value>            </list>        </property>    </bean>    <!-- 启动SpringMVC的注解功能,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>    <!-- 定义跳转的文件的前后缀 ,视图模式配置-->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 -->        <property name="prefix" value="/WEB-INF/jsp/" />        <property name="suffix" value=".jsp" />    </bean>    <!-- 配置文件上传,如果没有使用文件上传可以不用配置,当然如果不配,那么配置文件中也不必引入上传组件包 -->    <bean id="multipartResolver"          class="org.springframework.web.multipart.commons.CommonsMultipartResolver">        <!-- 默认编码 -->        <property name="defaultEncoding" value="utf-8" />        <!-- 文件大小最大值 -->        <property name="maxUploadSize" value="10485760000" />        <!-- 内存中的最大值 -->        <property name="maxInMemorySize" value="40960" />    </bean></beans>

4.1配置web.xml文件
这里面对spring-mybatis.xml的引入以及配置的spring-mvc的Servlet就是为了完成SSM整合,之前2框架整合不需要在此处进行任何配置。配置一样有详细注释,不多解释了。

<!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>Archetype Created Web Application</display-name>    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:spring-mybatis.xml</param-value>    </context-param>    <!-- 编码过滤器 -->    <filter>        <filter-name>encodingFilter</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <async-supported>true</async-supported>        <init-param>            <param-name>encoding</param-name>            <param-value>UTF-8</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>encodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- Spring监听器 -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!-- 防止Spring内存溢出监听器 -->    <listener>        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>    </listener>    <!-- Spring MVC servlet -->    <servlet>        <servlet-name>SpringMVC</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring-mvc.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>        <async-supported>true</async-supported>    </servlet>    <servlet-mapping>        <servlet-name>SpringMVC</servlet-name>        <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 -->        <url-pattern>/</url-pattern>    </servlet-mapping>    <welcome-file-list>        <welcome-file>/index.jsp</welcome-file>    </welcome-file-list></web-app>

4.2测试
至此已经完成了SSM三大框架的整合了,接下来测试一下,如果成功了,那么恭喜你,如果失败了,继续调试吧,作为程序员就是不停的与BUG做斗争!
4.3新建jsp页面
这里写图片描述

<%--  Created by IntelliJ IDEA.  User: Administrator  Date: 2016/4/20 0020  Time: 14:14  To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head>    <title>Test</title></head><body></body></html>

4.4新建Controller

这里写图片描述

package com.wangjie.spring.controller;import com.wangjie.spring.model.User;import com.wangjie.spring.service.UserService;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.annotation.Resource;import org.springframework.ui.Model; ;import javax.servlet.http.HttpServletRequest;/** * Created by wangjie on 2016/4/20 0020. */@Controller@RequestMapping("/user")public class UserController {    @Resource    private UserService userService;    @RequestMapping("/showUser")    public String toIndex(HttpServletRequest request, Model model) {        int userId = Integer.parseInt(request.getParameter("id"));        User user = this.userService.getUserById(userId);        model.addAttribute("user", user);        return "showUser";    }}

4.5部署项目
这里写图片描述
项目下载地址:https://git.oschina.net/jiejie2016/SpringMvc.git

**注:
1.项目mapping中xml一定要放在resources下否则会出现异常
可参考:http://blog.csdn.net/xiwenren/article/details/49101605
2.mybatis生成java实体类工具:http://download.csdn.net/detail/jiejie1993/9497073
**

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