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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