这么早JAVA中利用SSM框架搭建一个CRUD

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使用的是Maven插件来配置我们需要的jar包，由于操作不多，所以并没有配置很多，要注意自己使用的jdk的版本，选择不同版本号的jdk

<project xmlns="Http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.lr</groupId> <artifactId>ssm</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>ssm Maven WEBapp</name> <url>http://maven.apache.org</url> <!-- 用来设置版本号 -->   <properties>     <srping.version>4.0.2.RELEASE</srping.version>     <mybatis.version>3.2.8</mybatis.version>     <slf4j.version>1.7.12</slf4j.version>     <log4j.version>1.2.17</log4j.version>   </properties>   <!-- 用到的jar包 -->   <dependencies>     <!-- 单元测试 -->     <dependency>       <groupId>junit</groupId>       <artifactId>junit</artifactId>       <version>4.11</version>       <!-- 表示开发的时候引入，发布的时候不会加载此包 -->       <scope>test</scope>     </dependency>     <!-- java ee包 -->     <dependency>       <groupId>javax</groupId>       <artifactId>javaee-api</artifactId>       <version>7.0</version>     </dependency>     <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->    <dependency>      <groupId>com.fasterxml.jackson.core</groupId>      <artifactId>jackson-databind</artifactId>      <version>2.8.8</version>    </dependency>        <!-- spring框架包 start -->     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-test</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-core</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-oxm</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-tx</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-jdbc</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-aop</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-context</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-context-support</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-expression</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-ORM</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-web</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-webmvc</artifactId>       <version>${srping.version}</version>     </dependency>     <dependency>       <groupId>org.springframework</groupId>       <artifactId>spring-aspects</artifactId>       <version>${srping.version}</version>     </dependency>     <!-- spring框架包 end -->     <!-- mybatis框架包 start -->     <dependency>       <groupId>org.mybatis</groupId>       <artifactId>mybatis</artifactId>       <version>${mybatis.version}</version>     </dependency>     <dependency>       <groupId>org.mybatis</groupId>       <artifactId>mybatis-spring</artifactId>       <version>1.2.2</version>     </dependency>     <!-- mybatis框架包 end -->     <!-- 数据库驱动 -->     <dependency>       <groupId>mysql</groupId>       <artifactId>Mysql-connector-java</artifactId>       <version>5.1.35</version>     </dependency>     <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->     <dependency>       <groupId>commons-dbcp</groupId>       <artifactId>commons-dbcp</artifactId>       <version>1.4</version>     </dependency>     <!-- jstl标签类 -->     <dependency>       <groupId>jstl</groupId>       <artifactId>jstl</artifactId>       <version>1.2</version>     </dependency>     <dependency>       <groupId>taglibs</groupId>       <artifactId>standard</artifactId>       <version>1.1.2</version>     </dependency>     <!-- log start -->     <dependency>       <groupId>log4j</groupId>       <artifactId>log4j</artifactId>       <version>${log4j.version}</version>     </dependency>     <dependency>       <groupId>org.slf4j</groupId>       <artifactId>slf4j-api</artifactId>       <version>${slf4j.version}</version>     </dependency>     <dependency>       <groupId>org.slf4j</groupId>       <artifactId>slf4j-log4j12</artifactId>       <version>${slf4j.version}</version>     </dependency>     <!-- log END -->     <!-- JSON -->     <!-- 格式化对象，方便输出日志 -->     <dependency>       <groupId>com.alibaba</groupId>       <artifactId>fastjson</artifactId>       <version>1.2.6</version>     </dependency>     <dependency>       <groupId>org.codehaus.jackson</groupId>       <artifactId>jackson-mapper-asl</artifactId>       <version>1.9.13</version>     </dependency>     <!-- 上传组件包 start -->     <dependency>       <groupId>commons-fileupload</groupId>       <artifactId>commons-fileupload</artifactId>       <version>1.3.1</version>     </dependency>     <dependency>       <groupId>commons-io</groupId>       <artifactId>commons-io</artifactId>       <version>2.4</version>     </dependency>     <dependency>       <groupId>commons-codec</groupId>       <artifactId>commons-codec</artifactId>       <version>1.10</version>     </dependency>     <!-- 上传组件包 end -->      <!-- AL相关添加 -->     <dependency>       <groupId>net.sourceforge.jexcelapi</groupId>       <artifactId>jxl</artifactId>       <version>2.6</version>     </dependency>     <dependency>       <groupId>org.apache.poi</groupId>       <artifactId>poi</artifactId>       <version>3.8</version>     </dependency>     <dependency>       <groupId>org.apache.poi</groupId>       <artifactId>poi-ooxml</artifactId>       <version>3.9</version>     </dependency>     <!-- AL相关添加 -->   </dependencies>     <build>     <finalName>Maven_Project</finalName>     <plugins>       <plugin>         <groupId>org.apache.maven.plugins</groupId>         <artifactId>maven-compiler-plugin</artifactId>         <version>2.3.2</version>         <configuration>           <source>1.7</source>           <target>1.7</target>         </configuration>       </plugin>     </plugins>   </build>  </project>

然后配置数据库的连接，改成自己的数据库就行了

driver=com.mysql.jdbc.Driverurl=jdbc\:mysql\://locahost\:3306/dbusername=rootpassWord=rootmaxActive=20maxIdle=20minIdle=1maxWait=60000

配置文件spring-dao.xml，Spring会自动查找其下的类

<?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:p="http://www.springframework.org/schema/p"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:mvc="http://www.springframework.org/schema/mvc"   xsi:schemaLocation="http://www.springframework.org/schema/beans              http://www.springframework.org/schema/beans/spring-beans-3.1.xsd              http://www.springframework.org/schema/context              http://www.springframework.org/schema/context/spring-context-3.1.xsd              http://www.springframework.org/schema/mvc              http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">                             <!-- DAO接口所在包名，Spring会自动查找其下的类 -->   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">     <!--basePackage指定要扫描的包，在此包之下的映射器都会被搜索到。      可指定多个包，包与包之间用逗号或分号分隔-->     <property name="basePackage" value="com.lr.dao" />     <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>   </bean>                          </beans>

配置文件Spring和Mybatis的整合文件

<?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:p="http://www.springframework.org/schema/p"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:mvc="http://www.springframework.org/schema/mvc"   xsi:schemaLocation="http://www.springframework.org/schema/beans              http://www.springframework.org/schema/beans/spring-beans-4.0.xsd              http://www.springframework.org/schema/context              http://www.springframework.org/schema/context/spring-context-4.0.xsd              http://www.springframework.org/schema/mvc              http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">    <!-- 引入配置文件 --> <context:property-placeholder location="classpath:/jdbc.properties" />  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">     <property name="driverClassName" value="com.mysql.jdbc.Driver" />    <property name="url" value="jdbc:mysql://localhost:3306/db?useUnicode=true&amp;characterEncoding=utf8" />    <property name="username" value="root" />    <property name="password" value="root" />    <!-- 初始化连接大小 -->    <property name="initialSize" value="3" />     <!-- 连接池最大数量 -->    <property name="maxActive" value="20" />    <!-- 连接池最大空闲 -->    <property name="maxIdle" value="20" />    <!-- 连接池最小空闲 -->     <property name="minIdle" value="1" />    <!-- 获取连接最大等待时间 -->     <property name="maxWait" value="60000" />  </bean>    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">     <property name="dataSource" ref="dataSource" />     <!-- 自动扫描mapping.xml文件 -->     <property name="mapperLocations" value="classpath:com/lr/mapper/*.xml"></property>   </bean>    </beans>

配置事物的文件

<?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:p="http://www.springframework.org/schema/p"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:aop="http://www.springframework.org/schema/aop"   xmlns:tx="http://www.springframework.org/schema/tx"   xmlns:mvc="http://www.springframework.org/schema/mvc"   xsi:schemaLocation="http://www.springframework.org/schema/beans              http://www.springframework.org/schema/beans/spring-beans-3.1.xsd              http://www.springframework.org/schema/context              http://www.springframework.org/schema/context/spring-context-3.1.xsd              http://www.springframework.org/schema/aop              http://www.springframework.org/schema/aop/spring-aop-3.1.xsd             http://www.springframework.org/schema/tx             http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->   <bean id="transactionManager"     class="org.springframework.jdbc.datasource.DataSourceTransactionManager">     <property name="dataSource" ref="dataSource" />   </bean>       <!-- 配置参与事务的类 -->    <aop:config>      <aop:pointcut id="allServiceMethod" expression="execution(* com.lr.service.*.*(..))"/>      <aop:advisor pointcut-ref="allServiceMethod" advice-ref="txAdvice" />    </aop:config>      <!-- 使用声明方式配置事务 -->   <tx:advice id="txAdvice" transaction-manager="transactionManager">      <tx:attributes>         <tx:method name="*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>      </tx:attributes>   </tx:advice>    </beans>

配置springMVC.xml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:p="http://www.springframework.org/schema/p"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:mvc="http://www.springframework.org/schema/mvc"   xsi:schemaLocation="http://www.springframework.org/schema/beans              http://www.springframework.org/schema/beans/spring-beans-3.1.xsd              http://www.springframework.org/schema/context              http://www.springframework.org/schema/context/spring-context-3.1.xsd              http://www.springframework.org/schema/mvc              http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">      <!-- 自动扫描 -->   <context:component-scan base-package="com.lr.controller" />      <mvc:annotation-driven />     <mvc:default-servlet-handler/>    <!-- 定义跳转的文件的前后缀 ，视图模式配置-->   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">         <property name="prefix" value="/WEB-INF/jsp/" />     <property name="suffix" value=".jsp" />   </bean>

好了！！！需要配置的文件已经配置完成了，足够我们进行一波操作了

接下来是后台的一些代码，这里主要是实体类，dao层，service层，controller层，我把后台的文件一起上传了，mapper.xml文件是实现方法最关键的地方

<?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.lr.dao.IUserDao">  <resultMap id="BaseResultMap" type="com.lr.dto.User">    <result column="id" property="id" jdbcType="INTEGER" />     <result column="name" property="name" jdbcType="VARCHAR" />     <result column="password" property="password" jdbcType="VARCHAR" />     <result column="age" property="age" jdbcType="INTEGER" />   </resultMap>    <sql id="Base_Column_List">     id, name, password, age   </sql>        <!--  增加用户 -->   <insert id="addUser" parameterType="com.lr.dto.User">    insert into user(name,password,age) values(#{name},#{password},#{age})  </insert>     <!-- 查询用户-->   <select id="queryByPrimaryKey" resultMap="BaseResultMap"     parameterType="java.lang.Integer">     select     <include refid="Base_Column_List" />     from user     where id = #{id}   </select>        <!-- 删除用户 -->   <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">     delete from user     where id = #{id}    </delete>       <!-- 更新用户 -->   <update id="updateByPrimaryKey" parameterType="com.lr.dto.User" >      update user set name=#{name},password=#{password},age=#{age} where id=#{id}  </update>     <select id="findallUser" resultType="com.lr.dto.User">    select * from user  </select>  </mapper>

package com.lr.dao;import java.util.List;import com.lr.dto.User;public interface IUserDao {   //查询用户   public User queryByPrimaryKey(int id);    //删除用户   public int deleteByPrimaryKey(int id);   //更新用户  public int updateByPrimaryKey(User user);  //添加用户  public int addUser(User user);  //查询所有用户  public List<User> findallUser();}

package com.lr.service;import java.util.List;import com.lr.dto.User;public interface IUserService {  //查询用户    public User getUserById(int userId);   //删除   public void deleteUser(int id);   //更新用户   public void updateUser(User user);  //添加用户   public void addUser(User user);   //查看所有用户   public List<User> findallUser();}

package com.lr.service.Impl;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Service;import com.lr.dao.IUserDao;import com.lr.dto.User;import com.lr.service.IUserService;@Service("userService")public class UserServiceImpl implements IUserService{  @Resource  private IUserDao userdao;    public IUserDao getUserdao() {    return userdao;  }  public void setUserdao(IUserDao userdao) {    this.userdao = userdao;  }  //查询用户  @Override  public User getUserById(int userId) {        return userdao.queryByPrimaryKey(userId);  }  //更新用户  @Override  public void updateUser(User user) {    userdao.updateByPrimaryKey(user);      }  //删除用户  @Override  public void deleteUser(int id) {        userdao.deleteByPrimaryKey(id);  }    //添加用户  @Override  public void addUser(User user) {        userdao.addUser(user);  }    //查询所有用户  @Override  public List<User> findallUser() {        return userdao.findallUser();  }}

package com.lr.controller;import java.util.List;import javax.servlet.http.HttpServletRequest;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import com.lr.dto.User;import com.lr.service.IUserService;@Controllerpublic class UserController {  @Autowired  private IUserService userService;    public IUserService getUserService() {    return userService;  }  public void setUserService(IUserService userService) {    this.userService = userService;  }     //主页面  @RequestMapping("/")  public String userMgr() {    return "showUser";  }    //添加用户  @RequestMapping("/addUser")  @ResponseBody  public void userAdd(User user) {    userService.addUser(user);  }    //删除用户  @RequestMapping("/deleteUser")  @ResponseBody  public void deleteUser(int id){    userService.deleteUser(id);  }    //修改用户  @RequestMapping("/updateUser")  @ResponseBody  public void upadteUser(User user){        userService.updateUser(user);      }  //根据id查找用户  @RequestMapping("/showUser")   @ResponseBody  public User showUser(int id,Model model){      return userService.getUserById(id);       }    //查询所有用户  @RequestMapping("/findallUser")  @ResponseBody  public List<User> findallUser(){    return userService.findallUser();  }}

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE html><html> <head>    <meta charset="utf-8"><script type="text/javascript" src="<%= application.getContextPath() %>/js/Jquery-1.12.4.min.js"></script>  <script type="text/javascript">        //添加用户    $(function(){      $("#add").on("click", addNewUser);        })    function addNewUser(){      var name = $.trim($("#txtName").val());      var password = $.trim($("#txtPassword").val());      var age = $.trim($("#txtAge").val());            $.post("/ssm/addUser", {"name": name, "password": password, "age": age}, function(){        alert("添加成功！")      });    }              //删除用户    $(function(){      $("#delete").on("click",deleteUser);    })    function deleteUser(){      var id=$.trim($("#deleteid").val());      $.get("/ssm/deleteUser",{"id":id},function(){        alert("删除成功！")      });    }          //查询所有用户    $(function(){      $("#findalluser").click(function(){        $.ajax({          type:"POST",          dataType:"json",          url:"/ssm/findallUser",          success:function(msg){            var str="";            for(i in msg){              str+="<tr><th>"+msg[i].id+"</th><th>"+msg[i].name+"</th><th>"              +msg[i].password+"</th><th>"+msg[i].age+"</th><tr>"            }            $("#findall").append(str);          }        });      });    });            //根据id查找一个用户        $(function(){      $("#find").click(function(){        $.ajax({          type:"POST",          data:{id:$("#findid").val()},          dataType:"json",          url:"/ssm/showUser",          success:function(user){            var str="";              str+="<tr><th>"+user.id+"</th><th>"+user.name+"</th><th>"              +user.password+"</th><th>"+user.age+"</th><tr>"            $("#finduserbyid").append(str);          }                  })      })    })            //根据id修改用户信息    $(function(){      $("#update").on("click",updateUser);    })    function updateUser(){       alert($.trim($("#updateid").val()))      alert($.trim($("#updatename").val()))      alert($.trim($("#updatepassword").val()))      alert($.trim($("#updateage").val()))           var id=$.trim($("#updateid").val());      var name=$.trim($("#updatename").val());      var password=$.trim($("#updatepassword").val());      var age=$.trim($("#updateage").val());      $.post("/ssm/updateUser",{"id":id,"name":name,"password":password,"age":age},function(){        alert("修改成功！")      });    }  </script>     <title>用户管理</title>   </head> <body>  <div>    <p>姓名：<input type="text" id="txtName"></p>    <p>密码：<input type="password" id="txtPassword"></p>    <p>年龄：<input type="text" id="txtAge"></p>    <p><button id="add">添加</button></p>  </div>  <hr  />    <div>    <p>输入用户id:<input type="text" id="deleteid"></p>    <p><button id="delete">删除</button></p>  </div>    <hr  />    <div><p><button id="findalluser">查询所有</button></p></div>  <div>    <table width="300" border="1" >      <thead id="findall">        <tr>          <th width="50">id</th>          <th width="50">姓名</th>          <th width="50">密码</th>          <th width="50">年龄</th>        </tr>      </thead>    </table>  </div>  <hr  />    <div>    <p>输入用户id:<input type="text" id="findid"></p>    <p><button id="find">查询</button></p>  </div>   <div>    <table width="300" border="1" >      <thead id="finduserbyid">        <tr>          <th width="50">id</th>          <th width="50">姓名</th>          <th width="50">密码</th>          <th width="50">年龄</th>        </tr>      </thead>    </table>  </div>  <hr  />  <div>    <p>输入用户id:<input type="text" id="updateid"></p>    <p>输入用户姓名:<input type="text" id="updatename"></p>    <p>输入密码：<input type="password" id="updatepassword"></p>    <p>输入用户年龄:<input type="password" id="updateage"></p>    <p><button id="update">修改</button></p>  </div> </body></html>

上述就是小编为大家分享的这么早JAVA中利用SSM框架搭建一个CRUD了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注编程网精选频道。