SSM(spring +springmvc +mybatis)框架搭建
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今天做项目需要用SSM框架,花了点时间重新搭建了框架。把出现的问题及相关配置记录下来,方便下次用。
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、SSM整合
2.配置文件
====>数据库连接相关jdbc.properties
driver=com.mysql.jdbc.Drivername=rootuserpwd=rooturl=jdbc:mysql://localhost:3306/testjdbc.initialPoolSize=20 jdbc.maxPoolSize=100 jdbc.minPoolSize=10 jdbc.maxIdleTime=600 jdbc.acquireIncrement=5 jdbc.maxStatements=5 jdbc.idleConnectionTestPeriod=60
====》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" xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 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.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"><!--设置自动扫描 --><context:component-scan base-package="com.six.dao"></context:component-scan><!-- 配置数据源 --><context:property-placeholder location="classpath:resources/jdbc.properties"/><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${driver}"></property> <property name="jdbcUrl" value="${url}"></property> <property name="user" value="${name}"></property> <property name="password" value="${userpwd}"></property> <!-- 指定连接池中保留的最大连接数. Default:15--> <property name="maxPoolSize" value="${jdbc.maxPoolSize}"/> <!-- 指定连接池中保留的最小连接数--> <property name="minPoolSize" value="${jdbc.minPoolSize}"/> <!-- 指定连接池的初始化连接数 取值应在minPoolSize 与 maxPoolSize 之间.Default:3--> <property name="initialPoolSize" value="${jdbc.initialPoolSize}"/> <!-- 最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。 Default:0--> <property name="maxIdleTime" value="${jdbc.maxIdleTime}"/> <!-- 当连接池中的连接耗尽的时候c3p0一次同时获取的连接数. Default:3--> <property name="acquireIncrement" value="${jdbc.acquireIncrement}"/> <!-- JDBC的标准,用以控制数据源内加载的PreparedStatements数量。 但由于预缓存的statements属于单个connection而不是整个连接池所以设置这个参数需要考虑到多方面的因数.如果maxStatements与maxStatementsPerConnection均为0,则缓存被关闭。Default:0--> <property name="maxStatements" value="${jdbc.maxStatements}"/> <!-- 每60秒检查所有连接池中的空闲连接.Default:0 --> <property name="idleConnectionTestPeriod" value="${jdbc.idleConnectionTestPeriod}"/> </bean><!--aop事务 --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"p:dataSource-ref="dataSource" /><aop:config><aop:pointcut expression="execution(* com.six.service.*.*(..))" id="serviceMethod"/><aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/></aop:config><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="del*" propagation="REQUIRED"/><tx:method name="add*" propagation="REQUIRED"/><tx:method name="update*" propagation="REQUIRED"/><!--不走事务 --><tx:method name="*" read-only="true"/></tx:attributes></tx:advice><!-- 配置MyBatis与Spring的整合 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="mapperLocations" value="classpath:com/six/mapper/*.xml"></property></bean><!-- 配置扫描器,加载MyBatis接口对象 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.six.dao"></property> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property></bean></beans>
===>mybatis的映射文件
====>spring-service.xml配置
<?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:p="http://www.springframework.org/schema/p"
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.xsd">
<context:component-scan base-package="com.six.service"></context:component-scan>
</beans>
=====>spring-mvc.xml配置
<?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:p="http://www.springframework.org/schema/p" 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.xsd"><context:component-scan base-package="com.six.controller"></context:component-scan><mvc:annotation-driven/> <!-- 配置responseBody --><!-- 对转向页面的路径解析。prefix:前缀, suffix:后缀 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp"></bean></beans>
====>web.xml
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>spmvc</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <!-- 加载Spring容器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:resources/spring-*.xml</param-value> </context-param> <!-- 监听Spring容器中配置文件,目的当Tomcat启动后会初始化Spring容器中的配置文件 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- Spring 刷新Introspector防止内存泄露 --> <listener><listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <!-- 解决POST请求乱码 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:resources/springmvc-web.xml </param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping></web-app>
====》log4j.properties //放在src下
log4j.rootLogger=info,console,file
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=E:/log4j.log
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d %p [%c] - %m%n
===》具体测试代码
dao==》只需接口,不需要实现(spring-dao.xml已配置)
package com.six.dao;import java.util.List;import com.six.model.User;public interface TestDao {public List<User> getAll();}
===>service
package com.six.service;import java.util.List;import com.six.model.User;public interface TestService {public List<User> getAll();}package com.six.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.six.dao.TestDao;import com.six.model.User;import com.six.service.TestService;@Servicepublic class TestServiceImpl implements TestService {@Autowiredprivate TestDao td;@Overridepublic List<User> getAll() {// TODO Auto-generated method stubreturn td.getAll();}}
====>controller
package com.six.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.six.dao.TestDao;
import com.six.model.User;
import com.six.service.TestService;
@Service
public class TestServiceImpl implements TestService {
@Autowired
private TestDao td;
@Override
public List<User> getAll() {
// TODO Auto-generated method stub
return td.getAll();
}
}
====>与数据库表对应的实体类
==== 其中属性名与表中字段一致(不一致,需要在映射文件中配置)
package com.six.model;
public class User {
private String userName;
private String userPwd;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
}
==========================================
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