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。