JavaWeb-ssh框架搭建

1 环境

 

搭建SpringMVC+Spring+Hibernate4 ,Maven环境、 需要MySQL 数据库支持，使用的编程工具Eclipse  

搭建完毕后的项目架构如下：

2 新建Maven项目

2.1 新建Maven项目

2.2 选择web项目

点击【finish】

3 新建的项目架构

新建完毕，项目报错，并且缺少目录。修改如下：

3.1 显示所有的目录

目录结构为：

src/main/resources

src/main/java

src/test/resources

src/test/java

 

【右键项目】-->【Build Path】--> 【Configure Build Path】

会看见所有的目录，没有看见的目录拉其滚动条就可看见

 然后点击【Apply】-->【OK】即可。

如果没有出现，则重复以上步骤，然后双击【Allow ouput folders for source folders】，再进行【Apply】。

最后项目结构如下：

以上结构还需要添加一些东西，选中【项目右键】-->  【Build Path】--> 【new Source Folder】--> 【输入文件夹名称】--> 【Finish】.

这里新建src/test/resources 

目录如下：

3.2 修改项目的编辑版本

默认项目的编译级别是1.5 ，有一些JDK的新特性可能会报错，所以需要更换项目的编译级别。修改如下：

【右键项目】-->【Properties】

去掉选择，更换编译版本1.8

选择【Project Facets】然后修改Java版本，因为安装的是JDK1.8 所以选择1.8

然后点击【Apply】-->【OK】

3.3 加入依赖

结果工程还是报错，因为缺少类javax.servlet.http.HttpServlet，此类在javax包中。

在pom.xml中加入以下依赖：

<!-- JSP相关 -->          <dependency>              <groupId>jstl</groupId>              <artifactId>jstl</artifactId>              <version>1.2</version>          </dependency>          <dependency>              <groupId>javax.servlet</groupId>              <artifactId>servlet-api</artifactId>              <version>2.5</version>              <scope>provided</scope>          </dependency>                  <dependency>              <groupId>javax.servlet</groupId>              <artifactId>jsp-api</artifactId>              <version>2.0</version>              <scope>provided</scope>          </dependency>    

查看项目：

3.4 设置部署程序集（Web Deployment Assembly）

右键项目，选择[properties] -->[Deployment Assembly] 如下图:

4 Spring与Hibernate的整合

4.1 基本配置

4.1.1 添加依赖(pom.xml)

 <!-- spring --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</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-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version><scope>test</scope></dependency><!-- 使用SpringMVC需配置 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><!-- 关系型数据库整合时需配置 如hibernate jpa等 --><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>${spring.version}</version></dependency><!-- hibernate --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>${hibernate.version}</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-ehcache</artifactId><version>${hibernate.version}</version></dependency><!-- 二级缓存ehcache --><dependency><groupId>net.sf.ehcache</groupId><artifactId>ehcache</artifactId><version>2.9.0</version></dependency><!-- log4j --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency><!-- mysql连接 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.34</version></dependency><!-- c3p0数据源 --><dependency><groupId>com.mchange</groupId><artifactId>c3p0</artifactId><version>0.9.5-pre10</version></dependency><!-- json --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.3</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-annotations</artifactId><version>${jackson.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>${jackson.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>${jackson.version}</version></dependency><!-- aop --><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.4</version></dependency><!-- JSP相关 --><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><version>2.0</version><scope>provided</scope></dependency>

4.1.2 configure.properties

#application configs#jdbc c3p0 configjdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:3306/db_test?useUnicode=true&characterEncoding=utf-8jdbc.username=rootjdbc.password=123456#hibernate confighibernate.dialect=org.hibernate.dialect.MySQLDialecthibernate.show_sql=truehibernate.format_sql=truehibernate.hbm2ddl.auto=createhibernate.cache.use_second_level_cache=truehibernate.cache.use_query_cache=truehibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactoryhibernate.cache.provider_configuration_file_resource_path=ehcache.xml

4.1.3 spring.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.1.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.1.xsd"><!-- 加载配置文件 --><context:property-placeholder location="classpath:configer.properties"/><!-- 扫描service自动注入为bean --><context:component-scan base-package="cn.ssh.student" /></beans>

4.1.4 spring-hibernate.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: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-4.1.xsd           http://www.springframework.org/schema/tx           http://www.springframework.org/schema/tx/spring-tx-4.1.xsd          http://www.springframework.org/schema/aop           http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">        <!-- 配置数据源 c3p0 -->      <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"          destroy-method="close">          <property name="driverClass" value="${jdbc.driver}" />          <property name="jdbcUrl" value="${jdbc.url}" />          <property name="user" value="${jdbc.username}" />          <property name="password" value="${jdbc.password}" />            <!-- 请求超时时间 -->          <property name="checkoutTimeout" value="30000" />          <!-- 每60秒检查所有连接池中的空闲连接。默认值: 0，不检查 -->          <property name="idleConnectionTestPeriod" value="30" />          <!-- 连接数据库连接池最大空闲时间 -->          <property name="maxIdleTime" value="30" />          <!-- 连接池初始化连接数 -->          <property name="initialPoolSize" value="5" />          <property name="minPoolSize" value="5" />          <property name="maxPoolSize" value="20" />          <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。默认值: 3 -->          <property name="acquireIncrement" value="5" />      </bean>        <!-- 配置hibernate的SessionFactory -->      <bean id="sessionFactory"          class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">          <!-- 注入数据源 相关信息看源码 -->          <property name="dataSource" ref="dataSource" />          <!-- hibernate配置信息 -->          <property name="hibernateProperties">              <props>                  <prop key="hibernate.dialect">${hibernate.dialect}</prop>                  <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>                  <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>                  <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>                    <!-- 开启二级缓存 ehcache -->                  <prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>                  <prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>                  <prop key="hibernate.cache.region.factory_class">${hibernate.cache.region.factory_class}</prop>                  <prop key="hibernate.cache.provider_configuration_file_resource_path">${hibernate.cache.provider_configuration_file_resource_path}                  </prop>              </props>          </property>          <!-- 扫描hibernate注解配置的entity -->          <property name="packagesToScan" value="cn.ssh.entity" />      </bean>        <!-- 配置事务管理器 -->      <bean id="transactionManager"          class="org.springframework.orm.hibernate4.HibernateTransactionManager">          <property name="sessionFactory" ref="sessionFactory" />      </bean>        <aop:aspectj-autoproxy/></beans>  

4.1.5 Log4j的配置

### set log levels ###  log4j.rootLogger = INFO , C , D , E     ### console ###  log4j.appender.C = org.apache.log4j.ConsoleAppender  log4j.appender.C.Target = System.out  log4j.appender.C.layout = org.apache.log4j.PatternLayout  log4j.appender.C.layout.ConversionPattern = [student][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n    ### log file ###  log4j.appender.D = org.apache.log4j.DailyRollingFileAppender  log4j.appender.D.File = ./logs/student.log  log4j.appender.D.Append = true  log4j.appender.D.Threshold = INFO   log4j.appender.D.layout = org.apache.log4j.PatternLayout  log4j.appender.D.layout.ConversionPattern = [student][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n    ### exception ###  log4j.appender.E = org.apache.log4j.DailyRollingFileAppender  log4j.appender.E.File = ./logs/student_error.log   log4j.appender.E.Append = true  log4j.appender.E.Threshold = ERROR   log4j.appender.E.layout = org.apache.log4j.PatternLayout  log4j.appender.E.layout.ConversionPattern = [student][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n  

配置结构截图：

4.2 编写Entity

User代码：

package cn.ssh.student.entity;import java.io.Serializable;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name = "t_user")public class User implements Serializable {@Id     // 配置自动增长@GeneratedValue(strategy = GenerationType.IDENTITY)private Integer id;private String userName;private String password;private Integer age;private static final long serialVersionUID = 1L;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName == null ? null : userName.trim();}public String getPassword() {return password;}public void setPassword(String password) {this.password = password == null ? null : password.trim();}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}@Overridepublic String toString() {return "User [id=" + id + ", userName=" + userName + ", password=" + password + ", age=" + age + "]";}}

4.3 Dao层

4.3.1 GenericDao接口

package cn.ssh.student.dao;import java.io.Serializable;import java.util.List;public interface GenericDao<T, PK extends Serializable> {          T load(PK id);            T get(PK id);            List<T> findAll();            void persist(T entity);            PK save(T entity);            void saveOrUpdate(T entity);            void delete(PK id);            void flush();  }  

4.3.2 UserDao接口

 package cn.ssh.student.dao;import cn.ssh.student.entity.User;  public interface UserDao extends GenericDao<User, Integer> {    }  

4.3.3 UserDao接口实现类

package cn.ssh.student.dao.impl;import java.util.List;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import cn.ssh.student.dao.UserDao;import cn.ssh.student.entity.User;@Repositorypublic class UserDaoImpl implements UserDao {@Autowiredprivate SessionFactory sessionFactory;private Session getCurrentSession() {return this.sessionFactory.getCurrentSession();}@Overridepublic User load(String id) {return (User) this.getCurrentSession().load(User.class, id);}@Overridepublic User get(String id) {return (User) this.getCurrentSession().get(User.class, id);}@SuppressWarnings("unchecked")@Overridepublic List<User> findAll() {List<User> Users = this.getCurrentSession().createQuery("from User").setCacheable(true).list();return Users;}@Overridepublic void persist(User entity) {this.getCurrentSession().persist(entity);}@Overridepublic String save(User entity) {return (String) this.getCurrentSession().save(entity);}@Overridepublic void saveOrUpdate(User entity) {this.getCurrentSession().saveOrUpdate(entity);}@Overridepublic void delete(String id) {User entity = this.load(id);this.getCurrentSession().delete(entity);}@Overridepublic void flush() {this.getCurrentSession().flush();}}

项目架构：

4.4 Service层

4.4.1 UserService接口

 package cn.ssh.student.service;import java.util.List;import cn.ssh.student.entity.User;public interface UserService {User load(Integer id);User get(Integer id);List<User> findAll();void persist(User entity);Integer save(User entity);void saveOrUpdate(User entity);void delete(Integer id);void flush();}

4.4.2 UserService接口实现类

package cn.ssh.student.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import cn.ssh.student.dao.UserDao;import cn.ssh.student.entity.User;import cn.ssh.student.service.UserService;@Servicepublic class UserServiceImpl implements UserService {@Autowiredprivate UserDao userDao;@Override@Transactional(readOnly = true)public User load(Integer id) {return userDao.load(id);}@Override@Transactional(readOnly = true)public User get(Integer id) {return userDao.get(id);}@Override@Transactional(readOnly = true)public List<User> findAll() {return userDao.findAll();}@Override@Transactionalpublic void persist(User entity) {userDao.persist(entity);}@Override@Transactionalpublic Integer save(User entity) {return userDao.save(entity);}@Override@Transactionalpublic void saveOrUpdate(User entity) {userDao.saveOrUpdate(entity);}@Override@Transactionalpublic void delete(Integer id) {userDao.delete(id);}@Override@Transactionalpublic void flush() {userDao.flush();}}

4.5 测试

测试代码：

package cn.ssh.student.service;import java.util.List;import org.apache.log4j.Logger;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import cn.ssh.student.entity.User;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = { "classpath:spring.xml", "classpath:spring-hibernate.xml" })public class UserServiceTest {private static final Logger LOGGER = Logger.getLogger(UserServiceTest.class);@Autowiredprivate UserService userService;@Testpublic void testLoad() {System.out.println(userService);}@Testpublic void testGet() {User user = userService.get(5);System.out.println(user);}@Testpublic void testFindAll() {List<User> users = userService.findAll();System.out.println(users);}@Testpublic void testPersist() {}@Testpublic void testSave() {User user = new User();user.setAge(1);user.setPassword("123");user.setUserName("李四");userService.save(user);}@Testpublic void testSaveOrUpdate() {}@Testpublic void testDelete() {}@Testpublic void testFlush() {}}

执行testLoad()测试方法，测试成功，数据库自动生成表：

5 整合SpringMVC

5.1 spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc" 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"xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-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/mvc           http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"><!-- 自动扫描@Controller注入为bean --><context:component-scan base-package="cn.ssh.student.controller" /><!-- 以下为SpringMVC配置 --><mvc:annotation-driven><!-- 返回json数据，@response使用 --><mvc:message-converters register-defaults="true"><beanclass="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"><property name="supportedMediaTypes"><list><value>text/html;charset=UTF-8</value><value>application/json;charset=UTF-8</value></list></property></bean></mvc:message-converters></mvc:annotation-driven><!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass"value="org.springframework.web.servlet.view.JstlView" /><property name="prefix" value="/" /><property name="suffix" value=".jsp" /></bean></beans>  

spring-mvc的配置信息可以直接整合在spring-hibernate.xml这个配置文件中。

5.2 web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee       http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><display-name>Archetype Created Web Application</display-name><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring.xml,classpath:spring-hibernate.xml</param-value></context-param><filter><filter-name>encodingFilter</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><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- openSessionInView配置 作用是延迟session关闭到view层 --><filter><filter-name>openSessionInViewFilter</filter-name><filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class><init-param><param-name>singleSession</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>openSessionInViewFilter</filter-name><url-pattern>*.jsp</url-pattern></filter-mapping><!-- 监听servletContext，启动contextConfigLocation中的spring配置信息 --><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><description>spring mvc servlet</description><servlet-name>SpringMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><!-- 此处配置的是SpringMVC的配置文件 --><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>SpringMVC</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping><!-- 配置session超时时间，单位分钟 --><session-config><session-timeout>30</session-timeout></session-config><welcome-file-list><welcome-file>/index.jsp</welcome-file></welcome-file-list></web-app>

6 项目运行

内置tomcat运行

启动时为：tomcat7:run 因为在配置pom.xml中配置了tomcat插件的名字。

启动项目：

点击【Run】

启动成功：

7 用户管理

7.1 增加用户

页面预览

添加界面效果如图:

输入内容，并提交

7.1.1 后台代码

Controller层：// 添加@RequestMapping("/add")public String add(User user) {userService.save(user);// 重定向到查询所有用户return "redirect:getAll.do";}// 查询所有的用户@RequestMapping("/getAll")public String getAll(Model model) {List<User> list = userService.findAll();model.addAttribute("userList", list);return "show";}

Service层： @Override@Transactionalpublic Integer save(User entity) {return userDao.save(entity);}@Override@Transactional(readOnly = true)public List<User> findAll() {return userDao.findAll();}

7.1.2 页面代码

add.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"  %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><form action="student/add.do" method="post">姓名：<input name="userName" />年龄:<input name="age" />密码：<input name="password"/> <input type="submit"/></form></body></html>

查看所有页面代码（show.jsp）：

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><head><title>测试</title></head><body><c:forEach var="user" items="${userList}">    ${user.id}  ${user.userName}   <a href="delete.do?id=${user.id }">删除</a>  <a href="proupdate.do?id=${user.id }">更新</a>  <br/>  </c:forEach>    <a href="/add.jsp">新增</a></body></html>

7.2 查找用户

在浏览器中输入地址：http://localhost:8080/student/getById.do?id=2

7.2.1 后台代码

Controller层：// 查询某一个用户@RequestMapping("/getById")public String getById(Integer id, Model model) {User user = userService.get(id);model.addAttribute("user", user);        // 转发到showUser.jsp页面return "showUser";}

Service层 @Override@Transactional(readOnly = true)public User get(Integer id) {return userDao.get(id);}

7.2.2 页面代码

showUser.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"  %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  <head><title>查询单个用户</title>  </head>    <body>    ${user.id}  ${user.userName}  </body></html>

7.3 修改用户

查询所有用户，地址：http://localhost:8080/student/getAll.do

点击王武后面的【更新】

结果：

7.3.1 后台代码

Controller层：@RequestMapping("/update")public String update(User user){userService.saveOrUpdate(user);        // 更新成功，重定向查询所有return "redirect:getAll.do";}//更新之前@RequestMapping("/proupdate")public String proUpdate(Integer id,Model model){User user = userService.get(id);model.addAttribute("user",user);return "update";}

Service层：@Override@Transactional(readOnly = true)public User get(Integer id) {return userDao.get(id);}@Override@Transactionalpublic void saveOrUpdate(User entity) {userDao.saveOrUpdate(entity);}

7.3.2 页面代码

update.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><form action="update.do" method="post"><input type="hidden" name="id" value="${user.id }"/>姓名：<input name="userName" value="${user.userName }" />年龄:<input name="age" value="${user.age }"/>密码：<input name="password" value="${user.password }"/> <input type="submit"/></form></body></html>

7.4 删除用户

点击【删除】

7.4.1 后台代码

Controller层：// 删除某一个用户@RequestMapping("/delete")public String delete(Integer id,Model model) {userService.delete(id);// 重定向到查询所有的用户return "redirect:getAll.do";}

Service层：@Override@Transactionalpublic void delete(Integer id) {userDao.delete(id);}

8 项目下载

http://download.csdn.net/download/anoiadream/9935156

 

9 参考博客

http://blog.csdn.net/Ethan_Fu/article/details/49449369