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&
1890a
gt;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

读入数据库连接相关参数（可选）

配置数据连接池

配置连接属性，可以不读配置项文件直接在这里写死

配置c3p0，只配了几个常用的

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.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.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：

扫描service包所有注解 @Service

配置事务管理器，把事务管理交由spring来完成

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

开启SpringMVC注解模式，可以使用@RequestMapping，@PathVariable，@ResponseBody等

对静态资源处理，如js，css，jpg等

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”

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.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.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
@Service
public 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。