使用SSM(spring、SpringMVC和Mybatis)已经有三个多月了,项目在技术上已经没有什么难点了,基于现有的技术就可以实现想要的功能,当然肯定有很多可以改进的地方。之前没有记录SSM整合的过程,这次刚刚好基于自己的一个小项目重新搭建了一次,而且比项目搭建的要更好一些。以前解决问题的过程和方法并没有及时记录,以后在自己的小项目中遇到我再整理分享一下。这次,先说说三大框架整合过程。个人认为使用框架并不是很难,关键要理解其思想,这对于我们提高编程水平很有帮助。不过,如果用都不会,谈思想就变成纸上谈兵了!!!先技术,再思想。实践出真知。(可通过图片水印查看博客地址)
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
如果需要,参看之前的博文:http://blog.csdn.net/zhshulin/article/details/30779873
3、Maven Web项目创建
如果需要,参看之前的博文:http://blog.csdn.net/zhshulin/article/details/37921705
4、SSM整合
下面主要介绍三大框架的整合,至于环境的搭建以及项目的创建,参看上面的博文。这次整合我分了2个配置文件,分别是spring-mybatis.xml,包含spring和mybatis的配置文件,还有个是spring-mvc的配置文件,此外有2个资源文件:jdbc.propertis和log4j.properties。完整目录结构如下(最后附上源码下载地址,不建议直接使用源码,因为此教程已经有了全部代码):
使用框架都是较新的版本:
Spring 4.0.2 RELEASE
Spring MVC 4.0.2 RELEASE
MyBatis 3.2.6
4.1、Maven引入需要的JAR包
为了方便后面说的时候不需要引入JAR包,我这里直接给出所有需要的JAR包,这都是基本的JAR包,每个包的是干什么的都有注释,就不再多说了。
pom.xml
[html] view plain copy print?
- <properties>
- <!-- spring版本号 -->
- <spring.version>4.0.2.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>4.11</version>
- <!-- 表示开发的时候引入,发布的时候不会加载此包 -->
- <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>1.2.2</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>${slf4j.version}</version>
- </dependency>
- <!-- log end -->
- <!-- 映入JSON -->
- <dependency>
- <groupId>org.codehaus.jackson</groupId>
- <artifactId>jackson-mapper-asl</artifactId>
- <version>1.9.13</version>
- </dependency>
- <!-- 上传组件包 -->
- <dependency>
- <groupId>commons-fileupload</groupId>
- <artifactId>commons-fileupload</artifactId>
- <version>1.3.1</version>
- </dependency>
- <dependency>
- <groupId>commons-io</groupId>
- <artifactId>commons-io</artifactId>
- <version>2.4</version>
- </dependency>
- <dependency>
- <groupId>commons-codec</groupId>
- <artifactId>commons-codec</artifactId>
- <version>1.9</version>
- </dependency>
- </dependencies>
<properties> <!-- spring版本号 --> <spring.version>4.0.2.RELEASE</spring.version> <!-- mybatis版本号 --> <mybatis.version>3.2.6</mybatis.version> <!-- log4j日志文件管理包版本 --> <slf4j.version>1.7.7</slf4j.version> <log4j.version>1.2.17</log4j.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <!-- 表示开发的时候引入,发布的时候不会加载此包 --> <scope>test</scope> </dependency> <!-- spring核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${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>${mybatis.version}</version> </dependency> <!-- mybatis/spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.2</version> </dependency> <!-- 导入java ee jar 包 --> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> </dependency> <!-- 导入Mysql数据库链接jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.30</version> </dependency> <!-- 导入dbcp的jar包,用来在applicationContext.xml中配置数据库 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.2.2</version> </dependency> <!-- JSTL标签类 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- 日志文件管理包 --> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${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>
4.2、Spring与MyBatis的整合
所有需要的JAR包都引入以后,首先进行Spring与MyBatis的整合,然后再进行JUnit测试,先看一个项目结构图:
4.2.1、建立JDBC属性文件
jdbc.properties(文件编码修改为utf-8)
[html] view plain copy print?
- driver=com.mysql.jdbc.Driver
- url=jdbc:mysql://10.221.10.111:8080/db_zsl
- username=demao
- password=demao
- #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
driver=com.mysql.jdbc.Driver url=jdbc:mysql://10.221.10.111:8080/db_zsl username=demao password=demao #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
4.2.2、建立spring-mybatis.xml配置文件
这个文件就是用来完成spring和mybatis的整合的。这里面也没多少行配置,主要的就是自动扫描,自动注入,配置数据库。注释也很详细,大家看看就明白了。
spring-mybatis.xml
[html] view plain copy print?
- <?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 -->
- <context:component-scan base-package="com.cn.hnust" />
- <!-- 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="${maxWait}"></property>
- </bean>
- <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->
- <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
- <property name="dataSource" ref="dataSource" />
- <!-- 自动扫描mapping.xml文件 -->
- <property name="mapperLocations" value="classpath:com/cn/hnust/mapping/*.xml"></property>
- </bean>
- <!-- DAO接口所在包名,Spring会自动查找其下的类 -->
- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
- <property name="basePackage" value="com.cn.hnust.dao" />
- <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
- </bean>
- <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
- <bean id="transactionManager"
- class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
- <property name="dataSource" ref="dataSource" />
- </bean>
- </beans>
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自动扫描 --> <context:component-scan base-package="com.cn.hnust" /> <!-- 引入配置文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties" /> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${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:com/cn/hnust/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.cn.hnust.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>
4.2.3、Log4j的配置
为了方便调试,一般都会使用日志来输出信息,Log4j是Apache的一个开放源代码项目,通过使用Log4j,我们可以控制日志信息输送的目的地是控制台、文件、GUI组件,甚至是套接口服务器、NT的事件记录器、UNIX Syslog守护进程等;我们也可以控制每一条日志的输出格式;通过定义每一条日志信息的级别,我们能够更加细致地控制日志的生成过程。
Log4j的配置很简单,而且也是通用的,下面给出一个基本的配置,换到其他项目中也无需做多大的调整,如果想做调整或者想了解Log4j的各种配置,参看我转载的一篇博文,很详细:
http://blog.csdn.net/zhshulin/article/details/37937365
下面给出配置文件目录:
log4j.properties
[html] view plain copy print?
- #定义LOG输出级别
- log4j.rootLogger=INFO,Console,File
- #定义日志输出目的地为控制台
- log4j.appender.Console=org.apache.log4j.ConsoleAppender
- log4j.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.PatternLayout
- log4j.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/ssm.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 = ALL
- log4j.appender.File.layout = org.apache.log4j.PatternLayout
- log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
#定义LOG输出级别 log4j.rootLogger=INFO,Console,File #定义日志输出目的地为控制台 log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.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.PatternLayout log4j.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/ssm.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 = ALL log4j.appender.File.layout = org.apache.log4j.PatternLayout log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
4.2.4、JUnit测试
经过以上步骤(到4.2.2,log4j不配也没影响),我们已经完成了Spring和mybatis的整合,这样我们就可以编写一段测试代码来试试是否成功了。
4.2.4.1、创建测试用表
既然我们需要测试,那么我们就需要建立在数据库中建立一个测试表,这个表建的很简单,SQL语句为:
[sql] view plain copy print?
- DROP TABLE IF EXISTS `user_t`;
- CREATE TABLE `user_t` (
- `id` int(11) NOT NULL AUTO_INCREMENT,
- `user_name` varchar(40) NOT NULL,
- `password` varchar(255) NOT NULL,
- `age` int(4) NOT NULL,
- PRIMARY KEY (`id`)
- ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
- /*Data for the table `user_t` */
- insert into `user_t`(`id`,`user_name`,`password`,`age`) values (1,‘测试‘,‘sfasgfaf‘,24);
DROP TABLE IF EXISTS `user_t`; CREATE TABLE `user_t` ( `id` int(11) NOT NULL AUTO_INCREMENT, `user_name` varchar(40) NOT NULL, `password` varchar(255) NOT NULL, `age` int(4) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; /*Data for the table `user_t` */ insert into `user_t`(`id`,`user_name`,`password`,`age`) values (1,‘测试‘,‘sfasgfaf‘,24);
4.2.4.2、利用MyBatis Generator自动创建代码
参考博文:http://blog.csdn.net/zhshulin/article/details/23912615
这个可根据表自动创建实体类、MyBatis映射文件以及DAO接口,当然,我习惯将生成的接口名改为IUserDao,而不是直接用它生成的UserMapper。如果不想麻烦就可以不改。完成后将文件复制到工程中。如图:
4.2.4.3、建立Service接口和实现类
目录结构:
下面给出具体的内容:
IUserService.jave
[java] view plain copy print?
- package com.cn.hnust.service;
- import com.cn.hnust.pojo.User;
- public interface IUserService {
- public User getUserById(int userId);
- }
package com.cn.hnust.service; import com.cn.hnust.pojo.User; public interface IUserService { public User getUserById(int userId); }
UserServiceImpl.java
[java] view plain copy print?
- package com.cn.hnust.service.impl;
- import javax.annotation.Resource;
- import org.springframework.stereotype.Service;
- import com.cn.hnust.dao.IUserDao;
- import com.cn.hnust.pojo.User;
- import com.cn.hnust.service.IUserService;
- @Service("userService")
- public class UserServiceImpl implements IUserService {
- @Resource
- private IUserDao userDao;
- @Override
- public User getUserById(int userId) {
- // TODO Auto-generated method stub
- return this.userDao.selectByPrimaryKey(userId);
- }
- }
package com.cn.hnust.service.impl; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.cn.hnust.dao.IUserDao; import com.cn.hnust.pojo.User; import com.cn.hnust.service.IUserService; @Service("userService") public class UserServiceImpl implements IUserService { @Resource private IUserDao userDao; @Override public User getUserById(int userId) { // TODO Auto-generated method stub return this.userDao.selectByPrimaryKey(userId); } }
4.2.4.4、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。
[java] view plain copy print?
- package org.zsl.testmybatis;
- import javax.annotation.Resource;
- import org.apache.log4j.Logger;
- import org.junit.Before;
- import org.junit.Test;
- import org.junit.runner.RunWith;
- import org.springframework.context.ApplicationContext;
- import org.springframework.context.support.ClassPathXmlApplicationContext;
- import org.springframework.test.context.ContextConfiguration;
- import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
- import com.alibaba.fastjson.JSON;
- import com.cn.hnust.pojo.User;
- import com.cn.hnust.service.IUserService;
- @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);
- // private ApplicationContext ac = null;
- @Resource
- private IUserService userService = null;
- // @Before
- // public void before() {
- // ac = new ClassPathXmlApplicationContext("applicationContext.xml");
- // userService = (IUserService) ac.getBean("userService");
- // }
- @Test
- public void test1() {
- User user = userService.getUserById(1);
- // System.out.println(user.getUserName());
- // logger.info("值:"+user.getUserName());
- logger.info(JSON.toJSONString(user));
- }
- }
package org.zsl.testmybatis; import javax.annotation.Resource; import org.apache.log4j.Logger; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.alibaba.fastjson.JSON; import com.cn.hnust.pojo.User; import com.cn.hnust.service.IUserService; @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); // private ApplicationContext ac = null; @Resource private IUserService userService = null; // @Before // public void before() { // ac = new ClassPathXmlApplicationContext("applicationContext.xml"); // userService = (IUserService) ac.getBean("userService"); // } @Test public void test1() { User user = userService.getUserById(1); // System.out.println(user.getUserName()); // logger.info("值:"+user.getUserName()); logger.info(JSON.toJSONString(user)); } }
测试结果:
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。
4.3、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。
4.3.1、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。
[html] view plain copy print?
- <?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,使SpringMVC认为包下用了@controller注解的类是控制器 -->
- <context:component-scan base-package="com.cn.hnust.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>
<?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,使SpringMVC认为包下用了@controller注解的类是控制器 --> <context:component-scan base-package="com.cn.hnust.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>
4.3.2、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。
web.xml
[html] view plain copy print?
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xmlns="http://java.sun.com/xml/ns/javaee"
- xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
- version="3.0">
- <display-name>Archetype Created Web Application</display-name>
- <!-- Spring和mybatis的配置文件 -->
- <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>
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>Archetype Created Web Application</display-name> <!-- Spring和mybatis的配置文件 --> <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>
4.3.3、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!
4.3.3.1、新建jsp页面
showUser.jsp 此页面仅输出一下用户名,完成一个完整的简单流程。
[html] view plain copy print?
- <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <title>测试</title>
- </head>
- <body>
- ${user.userName}
- </body>
- </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>测试</title> </head> <body> ${user.userName} </body> </html>
4.3.3.2、建立UserController类
UserController.java 控制器
[java] view plain copy print?
- package com.cn.hnust.controller;
- import javax.annotation.Resource;
- import javax.servlet.http.HttpServletRequest;
- import org.springframework.stereotype.Controller;
- import org.springframework.ui.Model;
- import org.springframework.web.bind.annotation.RequestMapping;
- import com.cn.hnust.pojo.User;
- import com.cn.hnust.service.IUserService;
- @Controller
- @RequestMapping("/user")
- public class UserController {
- @Resource
- private IUserService 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";
- }
- }
package com.cn.hnust.controller; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import com.cn.hnust.pojo.User; import com.cn.hnust.service.IUserService; @Controller @RequestMapping("/user") public class UserController { @Resource private IUserService 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"; } }
4.3.3.3、部署项目
输入地址:localhost:8080/项目名称/user/showUser?id=1
至此,SSM三大框架的整合就完成了,在此基础上可再添加其他功能。
源码下载地址:http://download.csdn.net/detail/u012909091/7658611