SpringMVC之简单的增删改查示例（SSM整合）

虽然已经在做关于SpringMVC的项目。但是还没有写一些比较系统的博客。今天就先来说一说最简单的增删改查吧。这个例子是基于SpringMVC+Spring+Mybatis实现的。

环境配置

主要是几项配置：springmvc的配置，spring的配置，MyBatis的配置，jdbc的配置，和web.xml配置

springmvc.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:mvc="http://www.springframework.org/schema/mvc"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.2.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
  <!-- 文件扫描 -->
  <context:component-scan base-package="com.zhao"></context:component-scan>

  <!-- annotation-driven:默认创建了多个对象：RequestMappingHandlerMapping，RequestMappingHandlerAdapter
    也就提供对json格式支持
   -->
  <mvc:annotation-driven/>
  <!-- 视图解析器 -->
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/jsp/" />
    <property name="suffix" value=".jsp" />
  </bean>
</beans>

beans.xml(Spring的配置)

<?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:mvc="http://www.springframework.org/schema/mvc"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.2.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">

    <context:component-scan base-package="com.zhao"></context:component-scan>

  <!-- 第一步：配置数据源 -->
  <context:property-placeholder location="classpath:jdbc.properties" />
  <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="jdbcUrl" value="${jdbc.url}"></property>
    <property name="driverClass" value="${jdbc.driver}"></property>
    <property name="user" value="${jdbc.username}"></property>
    <property name="password" value="${jdbc.password}"></property>

  </bean>

  <!-- 第二步：创建sqlSessionFactory。生产sqlSession -->
  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="dataSource"></property>
  <property name="configLocation" value="classpath:sqlMapConfig.xml"></property>
  </bean>
  <!-- 配置mybatis接口代理开发
    * 接口类名和映射文件必须同名
    *　接口类和映射文件必须在同一个目录　下
    * 映射文件namespace名字必须是接口的全类路径名
    *　接口的方法名必须和映射Statement的ｉｄ一致
   -->
   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
   <property name="basePackage" value="com.zhao.mapper"></property>
   <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
   </bean>


  <!-- 第三步：事务 -->
  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  <property name="dataSource" ref="dataSource"></property>
  </bean>

  <!-- 配置通知 -->
  <tx:advice id="txAdvice" transaction-manager="transactionManager">
  <tx:attributes>
  <tx:method name="save*" propagation="REQUIRED" />
  <tx:method name="update*" propagation="REQUIRED" />
  <tx:method name="delete*" propagation="REQUIRED" />
  <tx:method name="insert*" propagation="REQUIRED" />
  <tx:method name="*" propagation="REQUIRED" />
  </tx:attributes>

  </tx:advice>

  <!-- 配置拦截service -->
  <aop:config>
  <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.zhao.service.*.*(..))"/>
  </aop:config>

</beans>

jdbc.properties(数据库jdbc的配置)

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc\:mysql\://localhost\:8888/blog
jdbc.username=root
jdbc.password=123456

web.xml的配置

<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
 <display-name></display-name>
 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
 <context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:beans.xml</param-value>
 </context-param>
 <listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 <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>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>classpath:springmvc.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
 </servlet-mapping>
</web-app>

spring的配置中已经添加了对数据源的支持。。在基础的应用中我们并不需要对MyBatis做什么配置。因此基本的配置就是如上所示。

增删改查的操作

首先是查的操作

列表显示所有信息

Controller层实现

  

@RequestMapping("/list")
 public String UserList(Model model) {

   List<User> list =userService.findAll();
   //传递数据至前端
   model.addAttribute("list",list);
   //返回对应视图
   return "itemsList";
 }

对应的Service实现层

@Override
public List<User> findAll() {
  UserExample example = new UserExample();
  List<User> list=  userMapper.selectByExample(example);
  return list;
}

前端页面实现细节

<table width="100%" border=1>
<tr>
  <td>ID</td>
  <td>用户名</td>
  <td>密码</td>
  <td>昵称</td>
  <td>电子邮箱</td>
  <td>操作</td>
</tr>
<c:forEach items="${list}" var="item">
<tr>
  <td>
  <input type="checkbox" name="iduser" value="${item.iduser}">
  </td>
  <td>${item.username }</td>
  <td>${item.password }</td>
  <td>${item.nickname }</td>
  <td>${item.email }</td>
  <td><a href="${pageContext.request.contextPath }/user/edit?iduser=${item.iduser}" rel="external nofollow" >修改</a>
  <a href="${pageContext.request.contextPath }/user/deleteByID?iduser=${item.iduser}" rel="external nofollow" >删除</a>
  </td>

</tr>
</c:forEach>

根据id修改相应的数据

Controller层实现

@RequestMapping("/edit")
public String Edit(Integer iduser,Model model)
{
  User user=userService.findById(iduser);
  model.addAttribute("item",user);
  return "editItem";
}

Service实现层实现

@RequestMapping("/edit")
public String Edit(Integer iduser,Model model)
{
  User user=userService.findById(iduser);
  //将要修改的值传递到前端
  model.addAttribute("item",user);
  return "editItem";
}
@RequestMapping(value ="/saveOrUpdate",method = RequestMethod.POST)
public String saveOrUpdate(User user)
{
  //保存修改的值
  userService.update(user);
  //跳转到对应的list路由
  return "redirect:list";
}

前端页面实现

<form id="itemForm" action="${pageContext.request.contextPath }/user/saveOrUpdate" method="post">
<input type="hidden" name="iduser" value="${item.iduser }"/>
修改商品信息：
<table width="100%" border=1>
<tr>
  <td>用户名称</td>
  <td><input type="text" name="username" value="${item.username }"/></td>
</tr>
<tr>
  <td>密码</td>
  <td><input type="text" name="password" value="${item.password}"/></td>
</tr>
<tr>
  <td>昵称</td>
  <td><input type="text" name="nickname" value="${item.nickname}"/></td>
</tr>
<tr>
  <td>email</td>
  <td><input type="text" name="email" value="${item.email}"/></td>
</tr>

<tr>
<td colspan="2" align="center"><input type="submit" value="提交"/>
</td>
</tr>
</table>

</form>

上述流程并未对是否查询成功做对应处理。有兴趣的同学可以尝试将其补充完整

根据id删除对应的数据

Controller层实现

@RequestMapping("/deleteByID")
public String deleteByID(Integer iduser)
{

  userService.deleteById(iduser);
  return "redirect:list";
}

Service实现层实现

@Override
public void deleteById(Integer iduser) {
  // TODO Auto-generated method stub
  userMapper.deleteByPrimaryKey(iduser);
}

前端页面上需要做的修改。已经在上述列表页面展示过了。在此不再赘述。

新增数据

Controller层实现

//超链接到对应的页面
@RequestMapping("/add")
public String Add()
{
  return "AddUser";
}
//保存数据到数据库后跳转到列表页面
@RequestMapping("/addUser")
public String Insert(User user)
{
  userService.insert(user);
  return "redirect:list";
}

Service实现层实现

@Override
public void insert(User user) {
  userMapper.insert(user);

}

前端页面实现

<form id="itemForm" action="${pageContext.request.contextPath }/user/addUser" method="post">
商品信息：
<table width="100%" border=1>
<tr>
  <td>用户名称</td>
  <td><input type="text" name="username"/></td>
</tr>
<tr>
  <td>密码</td>
  <td><input type="text" name="password"/></td>
</tr>
<tr>
  <td>昵称</td>
  <td><input type="text" name="nickname" /></td>
</tr>
<tr>
  <td>email</td>
  <td><input type="text" name="email"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="提交"/>
</td>
</tr>
</table>

</form>

以上就是一个完整的增删改查的全部过程。希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：http://www.jianshu.com/p/9f00cf73cd8e