采用框架Spring+SpringMVC+mybatis搭建框架，完成省市区级联查询

旧城等待， 2021-07-09 13:33 331阅读 0赞

今天花了点时间搭建了一个Spring+SpringMVC+mybatis的框架完成了，省市区级联查询；下面介绍我的具体步骤

注意：我的shengid，shengname,字段起的不规范（读者注意下）；

首先是搭建SSM框架：先看下整个项目的结构：

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首先是配置springmvc-servlet.xml配置文件：

<?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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"></property> <property name="maxUploadSize" value="10485760000"></property> <property name="maxInMemorySize" value="40960"></property> </bean>  <bean id="stringConverter" class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/plain;charset=UTF-8</value> </list> </property> </bean> <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="stringConverter"/> <ref bean="jsonConverter"/> </list> </property> </bean>   <context:component-scan base-package="com.controller"/> </beans>

再来配置applicationContext.xml文件（spring框架的配置文件）

<?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:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:tool="http://www.springframework.org/schema/tool" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/tool http://www.springframework.org/schema/tool/spring-tool.xsd" default-lazy-init="false" default-autowire="byName"> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"> </property> <property name="url" value="jdbc:mysql://localhost:3306/ssq"></property> <property name="username" value="root"></property> <property name="password" value="DCX5201314"></property> </bean> <bean id="sqlsessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource"> <ref bean="dataSource" /> </property> <property name="configLocation" value="classpath:mybatis.cfg.xml"></property> </bean>   <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean>  <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="get*" read-only="true" /> <tx:method name="find*" read-only="true" /> <tx:method name="load*" read-only="true" /> <tx:method name="select*" read-only="true" /> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="del*" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <aop:config proxy-target-class="true"> <aop:pointcut expression="execution(* service.*.*(..))" id="serviceMethod" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" /> </aop:config>  <context:annotation-config /> <context:component-scan base-package="com"/>   </beans>

再配置mybatis.cfg.xml文件：

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <mappers> <mapper resource="com/entity/shengMapper.xml"/> </mappers> </configuration>

再来看下配置这个框架需要导入的包：可以通过我的网址http://download.csdn.net/download/qq\_34178998/10025027下载（或者私聊我发），把这些文件放在WEB-INF/lib文件夹下，

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再新建com包再里面建立各个层文件：

首先是controller层：

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shengController.java文件内容：

package com.controller; import java.util.ArrayList; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.service.shengService; import com.utils.to_json; @Controller @RequestMapping("sheng") public class shengController { @Autowired private shengService shengService; public shengService getShengService() { return shengService; } public void setShengService(shengService shengService) { this.shengService = shengService; } /******************************查看**********************************************/ @RequestMapping("/selectAll") @ResponseBody public void selectAll(HttpServletRequest request,HttpServletResponse response,int typeid){ System.out.println("123"); List<Map<String, Object>> list=new ArrayList<Map<String, Object>>(); try { list=shengService.selectAll(typeid); } catch (Exception e) { e.printStackTrace(); } System.out.println("回来了"+list); to_json.writeJson(list, request, response); } }

接下来是service层：

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先是shengService.java接口层：

package com.service; import java.util.List; import java.util.Map; public interface shengService { //查询 public List<Map<String, Object>> selectAll(int typeid); }

接着是shengServiceImp.java实现层：

package com.service.imp; import java.util.List; import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.dao.shengDao; import com.service.shengService; @Service("shengService") public class shengServiceImp implements shengService{ @Autowired private shengDao shengDao; public shengDao getShengDao() { return shengDao; } public void setShengDao(shengDao shengDao) { this.shengDao = shengDao; } /*******************查询所有**************************************************/ public List<Map<String, Object>> selectAll(int typeid) { List<Map<String, Object>> list=shengDao.selectAll(typeid); return list; } }

最后是dao层  
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先是shengDao.java接口层：

package com.dao; import java.util.List; import java.util.Map; public interface shengDao { //查询 public List<Map<String, Object>> selectAll(int typeid); }

接着是shengDaoImp.java实现层：

package com.dao.imp; import java.util.List; import java.util.Map; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; import com.dao.shengDao; @Repository("dao") public class shengDaoImp implements shengDao{ @Autowired private SqlSessionFactory sqlSessionFactory;//因为采用mybatis所以SqlSessionFactory public SqlSessionFactory getSqlSessionFactory() { return sqlSessionFactory; } public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) { this.sqlSessionFactory = sqlSessionFactory; } public SqlSession getSqlSession(){ return sqlSessionFactory.openSession(); } /*****************查询所有******************************************************/ public List<Map<String, Object>> selectAll(int typeid) { //查询 System.out.println("laidao "); SqlSession session=getSqlSession(); List<Map<String, Object>> list=session.selectList("selectall",typeid); return list; } }

然后就要建立实体了：

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先是实体里面的字段，要与数据库里面的符合：

sheng.java文件：

package com.entity; public class sheng { private int shengid; private String shengname; private int typeid; public int getTypeid() { return typeid; } public void setTypeid(int typeid) { this.typeid = typeid; } public int getShengid() { return shengid; } public void setShengid(int shengid) { this.shengid = shengid; } public String getShengname() { return shengname; } public void setShengname(String shengname) { this.shengname = shengname; } }

接下累就是实体的配置文件了shengMapper.xml：

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">  <mapper namespace="com.entity.sheng"> <select id="selectall" resultType="com.entity.sheng" parameterType="int">  select shengid,shengname from sheng where typeid=#{shengid} </select> </mapper>

最后就要来写个工具包了：

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to\_json.java文件：

package com.utils; import java.io.PrintWriter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.alibaba.fastjson.JSON; public class to_json{ /** * 方法功能：将对象转换成JSON字符串，并响应回前台 * 参数：object * 返回值：void * 异常：IOException */ public static void writeJson(Object object,HttpServletRequest request,HttpServletResponse response) { PrintWriter out = null; try { String json = JSON.toJSONStringWithDateFormat(object, "yyyy-MM-dd HH:mm:ss"); response.setContentType("text/html;charset=utf-8"); out = response.getWriter(); //System.out.println(json); out.write(json); out.flush(); } catch (Exception e) { e.printStackTrace(); } finally { if (out != null) { out.close(); } } } }

再来配置web.xml的文件

<?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"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>DisplayChart</servlet-name> <servlet-class> org.jfree.chart.servlet.DisplayChart  </servlet-class> </servlet> <servlet-mapping> <servlet-name>DisplayChart</servlet-name> <url-pattern>/DisplayChart</url-pattern> </servlet-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-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping>  <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>  <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>

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show.jsp页面代码（注意要js文件）：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <script type="text/javascript" src="js/jquery-1.11.0.min.js"></script> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page">  <script type="text/javascript"> function show_1(){ alert("nihao "); $.ajax({ url:'sheng/selectAll.action', type:'post', data:{'typeid':0}, dataType:'json', success:function(data){ var t="<option value=''>--请选择省份--</option>"; for(var i=0;i<data.length;i++){ t+="<option value="+data[i].shengid+">"+data[i].shengname+"</option>" } $("#p").html(t); } }) } function show_2(){ var shengid=$("#p").val(); $.ajax({ url:'sheng/selectAll.action', type:'post', data:{'typeid':shengid}, dataType:'json', success:function(data){ var t="<option value=''>----请选择城市</option>"; for(var i=0;i<data.length;i++){ t+="<option value="+data[i].shengid+">"+data[i].shengname+"</option>" } $("#c").html(t); } }) } function show_3(){ var shiid=$("#c").val(); $.ajax({ url:'sheng/selectAll.action', type:'post', data:{"typeid":shiid}, dataType:'json', success:function(data){ var t="<option value=''>----请选择区</option>"; for(var i=0;i<data.length;i++){ t+="<option value="+data[i].shengid+">"+data[i].shengname+"</option>" } $("#a").html(t); } }) } </script> </head> <body οnlοad="show_1()"> 省份<select id="p" οnchange="show_2()"></select> 省会<select id="c" οnchange="show_3()"></select> 区<select id="a" ></select> </body> </html>

好了，最后的一部份也完成了。

再把数据库，建下数据库名叫做ssq，

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最后效果：

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这边是打包好的文件：http://download.csdn.net/download/qq\_34178998/10025597

好了，今天就到这，欢迎大家留言一起讨论![大笑][laugh.gif]

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