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SSH全注解开发
web.xml:
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="SSH" version="2.5"> <display-name>ssh</display-name> <welcome-file-list> <welcome-file>addUser.jsp</welcome-file> </welcome-file-list> <!-- 配置Spring的监听器,用于初始化ApplicationContext对象 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext*.xml</param-value> </context-param> <!-- struts2 的配置 --> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> <init-param> <param-name>filterConfig</param-name> <param-value>classpath:struts.xml</param-value> </init-param> <!-- 自动扫描action --> <init-param> <param-name>actionPackages</param-name> <param-value>com.ssh</param-value> </init-param> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping></web-app>
注意:web.xml中包含了Spring和struts的基本配置,自动扫描Action的配置就是告诉tomcat,我要使用注解来配置struts。
applicationContext.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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 自动扫描与装配bean --> <context:component-scan base-package="com.tgb.ssh"></context:component-scan> <!-- dbcp配置 --> <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> <property name="driverClassName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <value>jdbc:mysql://127.0.0.1:3307/ssh</value> </property> <property name="username"> <value>root</value> </property> <property name="password"> <value>123456</value> </property> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource"> <ref local="dataSource" /> </property> <property name="hibernateProperties"> <props> <!--配置Hibernate的方言--> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </prop> <prop key="hibernate.hbm2ddl.auto">update</prop> <!--格式化输出sql语句--> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.use_sql_comments">false</prop> </props> </property> <!--自动扫描实体 --> <property name="packagesToScan" value="com.tgb.ssh.model" /> </bean> <!-- 用注解来实现事务管理 --> <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <tx:annotation-driven transaction-manager="txManager"/> </beans>
注意:applicationContext.xml里配置了数据库连接的基本信息(对hibernate的管理),还有对所有bean的自动装配管理和事务的管理。
struts.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> <!-- 开启使用开发模式,详细错误提示 --> <constant name="struts.devMode" value="true" /> <!-- 将对象交给spring管理 --> <constant name="struts.objectFactory" value="spring" /> <!-- 指定资源编码类型 --> <constant name="struts.i18n.encoding" value="UTF-8" /> <!-- 指定每次请求到达,重新加载资源文件 --> <constant name="struts.i18n.reload" value="false" /> <!-- 指定每次配置文件更改后,自动重新加载 --> <constant name="struts.configuration.xml.reload" value="false" /> <!-- 默认后缀名 --> <constant name="struts.action.extension" value="action," /> </struts>
注意:struts.xml里配置了一些struts的基本参数,并告诉容器用Spring来管理自己。
到这里一个基本的SSH的配置就算完成了,配置很简单,而且每一项配置都有说明,相信理解上不会有什么问题。基础的配置就这么多,下面就是我们的注解发挥作用的时候了。
userAdd.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>添加用户</title> </head> <body> <form method="post" action="addUser"> 用户名:<input type="text" name="user.name"><br> 密码:<input type="password" name="user.password"><br> <input type="submit" value="登录"/> </form> </body></html>
用户添加页面,将用户信息提交给UserAction。
UserAction:
package com.tgb.ssh.action;import javax.annotation.Resource;import org.apache.struts2.convention.annotation.Action;import org.apache.struts2.convention.annotation.Result;import org.apache.struts2.convention.annotation.Results;import com.opensymphony.xwork2.ActionSupport;import com.tgb.ssh.model.User;import com.tgb.ssh.service.UserManager;@Results( { @Result(name="success",location="/success.jsp"), @Result(name="failure",location="/failure.jsp") }) public class UserAction extends ActionSupport { @Resource private UserManager userManager; private User user; @Action(value="addUser") public String addUser() { try { userManager.addUser(user); } catch (Exception e) { e.printStackTrace(); return "failure"; } return "success"; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } }
注意:UserAction通过注解配置Action的名字和返回的页面,通过@Resource活动Spring注入的UserManager对象,然后进行相应的操作。Action里还有@Namespace、@InterceptorRef等很多注解可以用,根据自己需要选择吧。
UserManager:
package com.tgb.ssh.service;import javax.annotation.Resource;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import com.tgb.ssh.dao.UserDao;import com.tgb.ssh.model.User;@Service@Transactionalpublic class UserManager { @Resource UserDao userDao; public void addUser(User user) { userDao.addUser(user); } }
注意:UserManager通过@Service自动装配到Spring的容器,为其他组件提供服务;通过@Transactional进行事务的管理;通过@Resource注入UserDao对象。
UserDao:
package com.tgb.ssh.dao;import javax.annotation.Resource;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.springframework.orm.hibernate4.HibernateTemplate;import org.springframework.stereotype.Repository;import com.tgb.ssh.model.User;@Repositorypublic class UserDao { @Resource(name="sessionFactory") private SessionFactory sessionFactory; public void addUser(User user ) { Session session = sessionFactory.getCurrentSession(); session.save(user); }}
注意:UserDao通过@Repository自动装配到Spring的容器,通过@Resource获得Sessionfactory,将User对象持久化。
User:
package com.tgb.ssh.model;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;@Entity(name="t_user")public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private int id; private String name; private String password; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; }}
注意:User通过@Entity将实体类映射到数据库,生成t_user表,通过@Id定义表的Id,通过@GenerateValue定义Id的生成策略。
本文转自:http://www.cnblogs.com/liushuijinger/p/3920607.html
SSH全注解开发