全注解实现SSM

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常用框架

SSM 全注解搭建

本文搭建的SSM框架，即Spring,Struts2,MyBatis。本次搭建采用了Maven对项目进行管理

1：建立maven的web项目

2：数据库中新建表，本文中，采用的是mysql数据库

3：进行配置文件的配置

此时，可关注以上配置文件，其中beans.xml是Spring的xml文件，mybatis.xml是Mybatis的配置，struts.xml是struts2的xml文件。generatorConfig是生成mapping,dao和domain的工具，稍后将做介绍。

beans.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:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
	xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd
		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.1.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

	<!-- 扫描项目中的注解 -->
	<context:annotation-config />
	<context:component-scan base-package="cn.wind" />
	<aop:aspectj-autoproxy proxy-target-class="true" />

	<!-- c3p0配置 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="driverClass" value="com.mysql.jdbc.Driver" />
		<property name="jdbcUrl">
			<value><![CDATA[jdbc:mysql:///exm_mybatis?useUnicode=true&characterEncoding=UTF-8]]></value>
		</property>
		<property name="user" value="root" />
		<property name="password" value="123456" />
		<property name="checkoutTimeout" value="3000" />
		<property name="maxPoolSize" value="3"></property>
	</bean>

	<!-- 创建SqlSessionFactory，同时指定数据源，整合mybatis，装配mapping文件 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="mapperLocations">
			<list>
				<value>classpath:cn/wind/mapping/*.xml</value>
			</list>
		</property>
		<property name="configLocation" value="classpath:mybatis.xml"></property>
	</bean>

	<!-- 自动扫描 将Mapper接口生成代理注入到Spring，实现自动装配 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="cn.wind.dao" />
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
	</bean>

	<!-- 配置事务管理器 -->
	<!-- 如果spring与mybatis整合，就直接使用databaseoure的事务就可以了 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 利用aop实现事务的配置 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="*" propagation="REQUIRED" />
		</tx:attributes>
	</tx:advice>
	<aop:config>
		<aop:pointcut expression="execution(* cn..service.I*Service.*(..))"
			id="cut" />
		<aop:advisor advice-ref="txAdvice" pointcut-ref="cut" />
	</aop:config>
</beans>

mybatis.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>
	<properties>
		<property name="dialect" value="oracle" />
	</properties>

	<settings>
		<!--全局映射器启用缓存 -->
		<!--<setting name="logImpl" value="STDOUT_LOGGING"/> -->
		<setting name="cacheEnabled" value="true" />
		<!--查询时，关闭关联对象即时加载以提高性能 -->
		<setting name="lazyLoadingEnabled" value="true" />
		<!--设置关联对象加载的形态，此处为按需加载字段(加载字段由SQL指 定)，不会加载关联表的所有字段，以提高性能 -->
		<setting name="aggressiveLazyLoading" value="false" />
		<!--对于未知的SQL查询，允许返回不同的结果集以达到通用的效果 -->
		<setting name="multipleResultSetsEnabled" value="true" />
		<!--允许使用列标签代替列名 -->
		<setting name="useColumnLabel" value="true" />
		<!--允许使用自定义的主键值(比如由程序生成的UUID 32位编码作为键值)，数据表的PK生成策略将被覆盖 <setting name="useGeneratedKeys" 
			value="true" /> -->
		<!--给予被嵌套的resultMap以字段-属性的映射支持 -->
		<setting name="autoMappingBehavior" value="FULL" />
		<setting name="mapUnderscoreToCamelCase" value="true" />

		<setting name="defaultExecutorType" value="SIMPLE" />
		<!--数据库超过25000秒仍未响应则超时 -->
		<setting name="defaultStatementTimeout" value="25000" />
	</settings>

	<typeAliases>
	</typeAliases>

</configuration>

struts2.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
	<!-- 自动装配 -->
	<constant name="struts.objectFactory.spring.autoWire.alwaysRespect"
		value="true" />
	<constant name="struts.enable.DynamicMethodInvocation" value="true" />
	<package name="onePackage" extends="json-default" namespace="/">
		<action name="user" class="cn.wind.action.UserAction">
			<result name="success">/jsps/succ.jsp</result>
		</action>
	</package>
	<!-- <include file="struts-demo.xml"></include> -->
</struts>

4：利用mybatis-generator-core，全自动生成mapping,domain,dao。本文后面附带此工具，可进行下载使用。另外，generatorConfig.xml可参考如下。在mysql和oracle中均可使用。由于本次构建环境采用的是mysql，故将oracle的配置注释起来了

注：generatorConfig.xml

<?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>
	<!-- 数据库驱动包位置 -->
	<classPathEntry location="D:\programfiles\.m2\repository\mysql\mysql-connector-java\5.1.34\mysql-connector-java-5.1.34.jar" />
	<!-- <classPathEntry location="D:\mybatis-generator\ojdbc14.jar" /> -->
	<context id="DB2Tables" targetRuntime="MyBatis3">
		<commentGenerator>
			<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://127.0.0.1:3306/exm_mybatis" userId="root" password="123456">
		<!-- <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@xxx.xxx.xxx.xxx:1521:ora10cq" userId="tap_sys" password="tap_sys"> -->
		</jdbcConnection>
		<javaTypeResolver>
			<property name="forceBigDecimals" value="false" />
		</javaTypeResolver>
		<!-- 生成模型的包名和位置 -->
		<javaModelGenerator targetPackage="cn.wind.domain"	targetProject="Demo_SSM_1">
			<property name="enableSubPackages" value="true" />
			<property name="trimStrings" value="true" />
		</javaModelGenerator>
		<!-- 生成的映射文件包名和位置 -->
		<sqlMapGenerator targetPackage="cn.wind.mapping"	targetProject="Demo_SSM_1">
			<property name="enableSubPackages" value="true" />
		</sqlMapGenerator>
		<!-- 生成DAO的包名和位置 -->
		<javaClientGenerator type="XMLMAPPER" targetPackage="cn.wind.dao" targetProject="Demo_SSM_1">
			<property name="enableSubPackages" value="true" />
		</javaClientGenerator>
		<!-- 要生成那些表(更改tableName和domainObjectName就可以) -->
		<table tableName="user"
			domainObjectName="User" enableCountByExample="false"
			enableUpdateByExample="false" enableDeleteByExample="false"
			enableSelectByExample="false" selectByExampleQueryId="false" />
	</context>
</generatorConfiguration>

除此之外，还需要oracle或者mysql的驱动包，亦可在本文后面下载

5：实现效果如下：

6：进行service的代码编写

IUserService.java

package cn.wind.service;

import cn.wind.domain.User;

public interface IUserService {
	int deleteByPrimaryKey(String id);

	int insert(User record);

	int insertSelective(User record);

	User selectByPrimaryKey(String id);

	int updateByPrimaryKeySelective(User record);

	int updateByPrimaryKey(User record);
}

UserService.java

package cn.wind.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.wind.dao.UserMapper;
import cn.wind.domain.User;

// @Service("UserService")给实例化的UserService取名字为UserService
@Service("UserService")
public class UserService implements IUserService {
	// 完成自动装配的工作
	// 通过 @Autowired的使用来消除 set ，get方法。
	@Autowired
	UserMapper userMapper;

	@Override
	public int deleteByPrimaryKey(String id) {
		userMapper.deleteByPrimaryKey(id);
		return 0;
	}

	@Override
	public int insert(User record) {
		userMapper.insert(record);
		return 0;
	}

	@Override
	public int insertSelective(User record) {
		userMapper.insertSelective(record);
		return 0;
	}

	@Override
	public User selectByPrimaryKey(String id) {
		return userMapper.selectByPrimaryKey(id);
	}

	@Override
	public int updateByPrimaryKeySelective(User record) {
		userMapper.updateByPrimaryKeySelective(record);
		return 0;
	}

	@Override
	public int updateByPrimaryKey(User record) {
		userMapper.updateByPrimaryKey(record);
		return 0;
	}
}

7：action

package cn.wind.action;

import org.springframework.beans.factory.annotation.Autowired;

import cn.wind.domain.User;
import cn.wind.service.IUserService;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<User> {

	private static final long serialVersionUID = 1L;
	private User u = new User();

	@Override
	public User getModel() {
		return u;
	}

	@Autowired
	IUserService userService;

	@Override
	public String execute() throws Exception {
		User user= userService.selectByPrimaryKey("1");
		System.out.println("query success:"+user.getName()+","+user.getPwd());
		return SUCCESS;
	}
}

8：此时，框架搭建完毕，进行测试。

http://localhost:8080/Demo_SSM_1/user

可以在console查看到查询内容。

这只是简单demo，不再做其他扩展