三大框架整合ssm：SpringMVC + Spring + Mybatis

github地址: https://github.com/laichilueng/ssm

首先打开IDE ，我这边用的是myeclipse10， 创建一个web项目，添加maven支持。

接着我们修改pom.xml文件，使用maven管理我们的jar包，这里可以参考我的pom.xml文件

pom.xml

<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/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>SSM</groupId>    <artifactId>SSM</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <name>SSM</name>    <description />    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>    </properties>    <dependencies>        <!-- 单元测试 -->        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.11</version>        </dependency>        <!-- 1.日志 -->        <!-- 实现slf4j接口并整合 -->        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-classic</artifactId>            <version>1.1.1</version>        </dependency>        <!-- 2.数据库 -->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.37</version>            <scope>runtime</scope>        </dependency>        <dependency>            <groupId>c3p0</groupId>            <artifactId>c3p0</artifactId>            <version>0.9.1.2</version>        </dependency>        <!-- DAO: MyBatis -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.3.0</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.2.3</version>        </dependency>        <!-- 3.Servlet web -->        <dependency>            <groupId>taglibs</groupId>            <artifactId>standard</artifactId>            <version>1.1.2</version>        </dependency>        <dependency>            <groupId>jstl</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-databind</artifactId>            <version>2.5.4</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>        </dependency>        <!-- 4.Spring -->        <!-- 1)Spring核心 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <!-- 2)Spring DAO层 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <!-- 3)Spring web -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <!-- 4)Spring test -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <!-- redis客户端:Jedis -->        <dependency>            <groupId>redis.clients</groupId>            <artifactId>jedis</artifactId>            <version>2.7.3</version>        </dependency>        <dependency>            <groupId>com.dyuproject.protostuff</groupId>            <artifactId>protostuff-core</artifactId>            <version>1.0.8</version>        </dependency>        <dependency>            <groupId>com.dyuproject.protostuff</groupId>            <artifactId>protostuff-runtime</artifactId>            <version>1.0.8</version>        </dependency>        <!-- Map工具类 -->        <dependency>            <groupId>commons-collections</groupId>            <artifactId>commons-collections</artifactId>            <version>3.2</version>        </dependency>        <dependency>            <groupId>org.apache.openejb</groupId>            <artifactId>javaee-api</artifactId>            <version>5.0-1</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>javax.servlet.jsp</groupId>            <artifactId>jsp-api</artifactId>            <version>2.1</version>            <scope>provided</scope>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <artifactId>maven-war-plugin</artifactId>            </plugin>            <plugin>                <artifactId>maven-compiler-plugin</artifactId>                <configuration>                    <source>1.5</source>                    <target>1.5</target>                </configuration>            </plugin>        </plugins>        <finalName>ssm</finalName>    </build></project>

然后我们创建对应的目录文件夹以及对应的包，并将resources和java添加到source里面。

创建后的目录

到了这里，目录的框架已经出来了，现在我们开始写配置文件。

首先我们配置mybatis，先在spring的文件夹里面创建一个spring-dao.xml

1. 读入数据库连接相关参数（可选）
2. 配置数据连接池
3. 配置连接属性，可以不读配置项文件直接在这里写死
4. 配置c3p0，只配了几个常用的
5. 配置SqlSessionFactory对象（mybatis）

spring-dao.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.xsd">    <!-- 配置整合mybatis过程 -->    <!-- 1.配置数据库相关参数properties的属性：${url} -->    <context:property-placeholder location="classpath:jdbc.properties" />    <!-- 2.数据库连接池 -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <!-- 配置连接池属性 -->        <property name="driverClass" value="${jdbc.driver}" />        <property name="jdbcUrl" value="${jdbc.url}" />        <property name="user" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />        <!-- c3p0连接池的私有属性 -->        <property name="maxPoolSize" value="30" />        <property name="minPoolSize" value="10" />        <!-- 关闭连接后不自动commit -->        <property name="autoCommitOnClose" value="false" />        <!-- 获取连接超时时间 -->        <property name="checkoutTimeout" value="10000" />        <!-- 当获取连接失败重试次数 -->        <property name="acquireRetryAttempts" value="2" />        <property name="automaticTestTable" value="test_c3p0"/>        <property name="idleConnectionTestPeriod" value="100000" />    </bean>    <!-- 3.配置SqlSessionFactory对象 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 注入数据库连接池 -->        <property name="dataSource" ref="dataSource" />        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->        <property name="configLocation" value="classpath:mybatis-config.xml" />        <!-- 扫描entity包 使用别名 -->        <property name="typeAliasesPackage" value="com.dnf.entity" />        <!-- 扫描sql配置文件:mapper需要的xml文件 -->        <property name="mapperLocations" value="classpath:mapper/*.xml" />    </bean>    <!-- 4.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 注入sqlSessionFactory -->        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />        <!-- 给出需要扫描Dao接口包 -->        <property name="basePackage" value="com.dnf.dao" />    </bean></beans>

然后在resources文件夹里面创建一个文件jdbc.properties，用来填写数据库信息

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://127.0.0.1:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8jdbc.username=rootjdbc.password=123456

因为使用了mybatis，所以我们在resource文件夹里创建一个mybatis-donfig.xml，用于配置mybatis

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>    <!-- 配置全局属性 -->    <settings>        <!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->        <setting name="useGeneratedKeys" value="true" />        <!-- 使用列别名替换列名 默认:true -->        <setting name="useColumnLabel" value="true" />        <!-- 开启驼峰命名转换:Table{create_time} -> Entity{createTime} -->        <setting name="mapUnderscoreToCamelCase" value="true" />    </settings></configuration>

至此，mybatis的配置基本完成，下面配置service层
首先在spring里面创建spring-service.xml文件，用于：

1. 扫描service包所有注解 @Service
2. 配置事务管理器，把事务管理交由spring来完成
3. 配置基于注解的声明式事务，可以直接在方法上@Transaction

spring-service.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:tx="http://www.springframework.org/schema/tx"    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/tx    http://www.springframework.org/schema/tx/spring-tx.xsd">    <!-- 扫描service包下所有使用注解的类型 -->    <context:component-scan base-package="com.lzl.service" />    <!-- 配置事务管理器 -->    <bean id="transactionManager"        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <!-- 注入数据库连接池 -->        <property name="dataSource" ref="dataSource" />    </bean>    <!-- 配置基于注解的声明式事务 -->    <tx:annotation-driven transaction-manager="transactionManager" /></beans>

接着我们配置controller，在spring文件夹里面创建spring-mvc.xml文件

1. 开启SpringMVC注解模式，可以使用@RequestMapping，@PathVariable，@ResponseBody等
2. 对静态资源处理，如js，css，jpg等
3. 配置jsp 显示ViewResolver，例如在controller中某个方法返回一个string类型的”login”，实际上会返回”/WEB-INF/login.jsp”
4. 扫描web层 @Controller

spring-mvc.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-3.2.xsd">    <!-- 配置SpringMVC -->    <!-- 1.开启SpringMVC注解模式 -->    <!-- 简化配置： (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter         (2)提供一些列：数据绑定，数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 -->    <mvc:annotation-driven />    <!-- 2.静态资源默认servlet配置 (1)加入对静态资源的处理：js,gif,png (2)允许使用"/"做整体映射 -->    <mvc:default-servlet-handler />    <mvc:resources mapping="/resources/**" location="/resources/"/>     <!-- 3.配置jsp 显示ViewResolver -->    <bean        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>    <!-- 4.扫描web相关的bean -->    <context:component-scan base-package="com.lzl.controller" />    <!--5. 拦截器的配置 -->    <mvc:interceptors>        <mvc:interceptor>            <!-- /**包括路径及其子路径 拦截所有controller 如果是/admin/* 拦截的是/admin/add, /admin/list,etc.                 而/admin/user/add不会被拦截 如果/admin/** 拦截/admin/user/add，/admin/add -->            <mvc:mapping path="/**" />            <!-- 由于拦截器是优先于mvc配置的静态资源路径，所以这里要使用mvc的execlude-mapping标签，否则拦截器将会拦截静态资源 这里的LoginInterceptor要自己写，可以上网查下interceptor的用法，也可以不配置该项目 -->            <mvc:exclude-mapping path="/resources/**"/>            <bean class="com.lzl.interceptors.LoginInterceptor"></bean>        </mvc:interceptor>    </mvc:interceptors>     <!--6. 全局异常配置 -->    <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">        <property name="exceptionMappings">            <props>                <prop key="java.lang.Exception">error/500</prop>                <prop key="java.lang.Throwable">error/500</prop>            </props>        </property>        <property name="statusCodes">            <props>                <prop key="errors/500">500</prop>            </props>        </property>        <!-- 设置日志输出级别，不定义则默认不输出警告等错误日志信息 -->        <property name="warnLogCategory" value="WARN"></property>        <!-- 默认错误页面，当找不到上面mappings中指定的异常对应视图时，使用本默认配置 -->        <property name="defaultErrorView" value="error/500"></property>        <!-- 默认HTTP状态码 -->        <property name="defaultStatusCode" value="500"></property>    </bean></beans>

最后就是修改web.xml文件，他位于webapp/WEB-INF下

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"    version="3.1" metadata-complete="true">    <display-name></display-name>    <welcome-file-list>        <welcome-file>index.jsp</welcome-file>    </welcome-file-list>    <!-- 配置DispatcherServlet -->    <servlet>        <servlet-name>seckill-dispatcher</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <!-- 配置springMVC需要加载的配置文件 spring-dao.xml,spring-service.xml,spring-web.xml             Mybatis - > spring -> springmvc -->        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring/spring-*.xml</param-value>        </init-param>    </servlet>    <servlet-mapping>        <servlet-name>seckill-dispatcher</servlet-name>        <!-- 默认匹配所有的请求 -->        <url-pattern>/</url-pattern>    </servlet-mapping></web-app>

在开发中，我们经常使用到日志输出，所以这里配置一个日志配置文件logback.xml，同样在resource里面创建文件。

logback.xml

<?xml version="1.0" encoding="UTF-8"?><configuration debug="true">    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">        <!-- encoders are by default assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder -->        <encoder>            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>        </encoder>    </appender>    <root level="debug">        <appender-ref ref="STDOUT" />    </root></configuration>

---

那么到目前为止我们一共配置了7个xml文件，现在我们测试一下使用tomcat跑，看看是否出错。（tomcat的配置在这里就不说了，大伙上网学习下）

框架是能跑起来的，那么目前为止我们已经成功整合了三大框架。下面我们结合数据库来测试该框架。首先在数据库中建立一个test库，并创建一张表。

创建一个测试表给c3p0连接池做测试CREATE TABLE `test_c3p0` (  `id` int(11) NOT NULL,  PRIMARY KEY (`id`));CREATE TABLE `book` (  `id` varchar(200) NOT NULL,  `name` varchar(50) DEFAULT NULL,  `author` varchar(50) DEFAULT NULL,  `number` int(10) NOT NULL,  PRIMARY KEY (`id`));

然后往里面添加一些数据, 然后修改jdbc.properties文件，填写数据库信息，如下：

jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://127.0.0.1:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8jdbc.username=rootjdbc.password=123456

在项目的entity里面创建实体类Book.java

Book.java

package com.lzl.entity;public class Book {    private String id;    private String name;    private String author;    private int number;    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getAuthor() {        return author;    }    public void setAuthor(String author) {        this.author = author;    }    public int getNumber() {        return number;    }    public void setNumber(int number) {        this.number = number;    }    @Override    public String toString() {        return "Book [id=" + id + ", name=" + name + ", author=" + author                + ", number=" + number + "]";    }}

在dao中创建接口BookDao.java

BookDao.java

package com.lzl.dao;import java.util.List;import com.lzl.entity.Book;public interface BookDao {    List<Book> query4books();}

接下来我们不需要实现这个接口，而是需要写mapper文件，这样mybatis会帮我们自动实现接口，在mapper中创建BookDao.xml

BookDao.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.lzl.dao.BookDao">    <!-- 目的：为dao接口方法提供sql语句配置 -->    <select id="query4books" resultType="Book">        SELECT            id,            name,            author,            number        FROM            book    </select></mapper>

dao层写完了，那么我们写对应的test方法。因为后面的业务逻辑需要写很多测试方法，所以我们抽象出一个BaseTest类，当我们调用单元测试前，先加载三大框架的配置文件,那么在写其他测试类时，只需要继承这个BaseTest类就可以了。

在test/java里面创建BaseTest.java
BaseTest.java

package com.lzl;import org.junit.runner.RunWith;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;/** * 配置spring和junit整合，junit启动时加载springIOC容器 spring-test,junit */@RunWith(SpringJUnit4ClassRunner.class)// 告诉junit spring配置文件@ContextConfiguration({ "classpath:spring/spring-dao.xml", "classpath:spring/spring-service.xml" })public class BaseTest {}

创建TestBookDao.java

package com.lzl.dao;import java.util.ArrayList;import java.util.List;import org.junit.Test;import org.springframework.beans.factory.annotation.Autowired;import com.lzl.BaseTest;import com.lzl.entity.Book;public class TestBookDao extends BaseTest{    @Autowired    private BookDao dao;    @Test    public void testquery4books(){        List<Book> list = new ArrayList<Book>();        list = dao.query4books();        for(Book book : list){            System.out.println(book.toString());        }    }}

进行junit测试，可看到测试结果

至此，我们的dao层测试已经完成了，下面将进行service层和controller层的测试。

首先在service中创建接口BookService.java

package com.lzl.service.impl;import java.util.List;import com.lzl.entity.Book;public interface BookService {    List<Book> query4books();}

然后在service.impl中创建实现类BookServiceImpl.java

package com.lzl.service.impl;import java.util.List;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.lzl.dao.BookDao;import com.lzl.entity.Book;//这里一定要加上service这个注解，这样spring初始化的时候会扫描该实现类@Servicepublic class BookServiceImpl implements BookService{    private Logger logger = LoggerFactory.getLogger(this.getClass());    @Autowired    private BookDao bookDao;    @Override    public List<Book> query4books() {        // TODO Auto-generated method stub        return bookDao.query4books();    }}

接着我们创建BookController类
BookController.java

package com.lzl.controller;import java.util.List;import javax.servlet.http.HttpServletRequest;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import com.lzl.entity.Book;import com.lzl.service.impl.BookService;@Controller@RequestMapping("/")public class BookController {    private Logger logger = LoggerFactory.getLogger(this.getClass());    @Autowired    private BookService service;// 该方法将请求映射到Book.jsp这个页面上    @RequestMapping("/book")    public String toBookPage(HttpServletRequest request){        List<Book> list = service.query4books();//      这里在请求Book页面时，查询所有的book并将其存到request里面        if(list != null){            for(Book book : list){                logger.info(book.toString());            }            request.setAttribute("books", list);        }//      返回string类型，jsp渲染器会自动寻找/jsp/Book.jsp        return "Book";    }}

接着在webapp/WEB-INF/jsp中创建Book.jsp，并将数据展示

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%    String path = request.getContextPath();    String basePath = request.getScheme() + "://"            + request.getServerName() + ":" + request.getServerPort()            + path + "/";%><!-- 引入jstl库 --><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>Book</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><link rel="stylesheet" type="text/css" href="styles.css"></head><body>    <div align="center">        <table>            <tr>                <td>id</td>                <td>name</td>                <td>author</td>                <td>number</td>            </tr>            <c:forEach var="book" items="${ books}">                <tr>                    <td>${ book.id}</td>                    <td>${ book.name}</td>                    <td>${ book.author}</td>                    <td>${ book.number}</td>                </tr>            </c:forEach>        </table>    </div></body></html>

然后请求页面

---

可以看到成功的把数据库中的数据取到页面中，至此三大框架测试完成。源码和jar包我已经打包放在了github上，需要的可以去下载，喜欢的请给个star。
github地址: https://github.com/laichilueng/ssm
若有什么疑问，欢迎与我联系，谢谢。