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>4.0.0modelVersion>
<groupId>SSMgroupId>
<artifactId>SSMartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>warpackaging>
<name>SSMname>
<description />
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
properties>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.11version>
dependency>
<dependency>
<groupId>ch.qos.logbackgroupId>
<artifactId>logback-classicartifactId>
<version>1.1.1version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.37version>
<scope>runtimescope>
dependency>
<dependency>
<groupId>c3p0groupId>
<artifactId>c3p0artifactId>
<version>0.9.1.2version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.3.0version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.2.3version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.5.4version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-beansartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>4.1.7.RELEASEversion>
dependency>
<dependency>
<groupId>redis.clientsgroupId>
<artifactId>jedisartifactId>
<version>2.7.3version>
dependency>
<dependency>
<groupId>com.dyuproject.protostuffgroupId>
<artifactId>protostuff-coreartifactId>
<version>1.0.8version>
dependency>
<dependency>
<groupId>com.dyuproject.protostuffgroupId>
<artifactId>protostuff-runtimeartifactId>
<version>1.0.8version>
dependency>
<dependency>
<groupId>commons-collectionsgroupId>
<artifactId>commons-collectionsartifactId>
<version>3.2version>
dependency>
<dependency>
<groupId>org.apache.openejbgroupId>
<artifactId>javaee-apiartifactId>
<version>5.0-1version>
<scope>providedscope>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
<scope>providedscope>
dependency>
<dependency>
<groupId>javax.servlet.jspgroupId>
<artifactId>jsp-apiartifactId>
<version>2.1version>
<scope>providedscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-war-pluginartifactId>
plugin>
<plugin>
<artifactId>maven-compiler-pluginartifactId>
<configuration>
<source>1.5source>
<target>1.5target>
configuration>
plugin>
plugins>
<finalName>ssmfinalName>
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
<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" />
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxPoolSize" value="30" />
<property name="minPoolSize" value="10" />
<property name="autoCommitOnClose" value="false" />
<property name="checkoutTimeout" value="10000" />
<property name="acquireRetryAttempts" value="2" />
<property name="automaticTestTable" value="test_c3p0"/>
<property name="idleConnectionTestPeriod" value="100000" />
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml" />
<property name="typeAliasesPackage" value="com.dnf.entity" />
<property name="mapperLocations" value="classpath:mapper/*.xml" />
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
<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
<configuration>
<settings>
<setting name="useGeneratedKeys" value="true" />
<setting name="useColumnLabel" value="true" />
<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
<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">
<context:component-scan base-package="com.lzl.service" />
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
bean>
<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
<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">
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<mvc:resources mapping="/resources/**" location="/resources/"/>
<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>
<context:component-scan base-package="com.lzl.controller" />
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**" />
<mvc:exclude-mapping path="/resources/**"/>
<bean class="com.lzl.interceptors.LoginInterceptor">bean>
mvc:interceptor>
mvc:interceptors>
<bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="exceptionMappings">
<props>
<prop key="java.lang.Exception">error/500prop>
<prop key="java.lang.Throwable">error/500prop>
props>
property>
<property name="statusCodes">
<props>
<prop key="errors/500">500prop>
props>
property>
<property name="warnLogCategory" value="WARN">property>
<property name="defaultErrorView" value="error/500">property>
<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
<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.jspwelcome-file>
welcome-file-list>
<servlet>
<servlet-name>seckill-dispatcherservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring/spring-*.xmlparam-value>
init-param>
servlet>
<servlet-mapping>
<servlet-name>seckill-dispatcherservlet-name>
<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
<configuration debug="true">
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%npattern>
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 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
<mapper namespace="com.lzl.dao.BookDao">
<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 list = new ArrayList();
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 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 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 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 + "/";
%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<base href="<%=basePath%>">
<title>Booktitle>
<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>idtd>
<td>nametd>
<td>authortd>
<td>numbertd>
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。