IDEA搭建SSM项目实现增删改查

首先打开IDEA，File—>New—>Project创建项目

选择左侧导航栏里的Maven，勾上勾，选择webapp

按如下图进行填写

创建完成后进入项目，右下角弹出的提示点击右边的Enable Auto-Import，自动配置

连接数据库，我用的是Mysql数据库，准备好有数据的数据库表

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在pom.xml里导入所需jar包：

<?xml version="1.0" encoding="UTF-8"?>
<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>
  <packaging>war</packaging>

  <name>Student-ssm</name>
  <groupId>com.accp</groupId>
  <artifactId>Student-ssm</artifactId>
  <version>1.0-SNAPSHOT</version>

  <dependencies>
      <dependency>
          <groupId>org.aspectj</groupId>
          <artifactId>aspectjweaver</artifactId>
          <version>1.8.8</version>
      </dependency>
      <!-- spring-webmvc -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>4.3.12.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>4.3.12.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>4.3.12.RELEASE</version>
      </dependency>

      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.4.5</version>
      </dependency>

      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.3.1</version>
      </dependency>

      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.44</version>
      </dependency>

      <!--数据源-->
      <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>druid</artifactId>
          <version>1.1.2</version>
      </dependency>

      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
      </dependency>
      <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.0.1</version>
          <scope>provided</scope>
      </dependency>
  </dependencies>

</project>

总体结构：

web.xml代码：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
         xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <!--乱码解决-->
    <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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--配置springmvc-->
    <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>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>
        

springmvc.xml代码：

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

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

    <!--数据库连接-->
    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="url" value="jdbc:mysql://localhost:3306/student?useUnicode=true&amp;characterEncoding=utf-8"/>
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="username" value="root"/>
        <property name="password" value="994994"/>
    </bean>

    <!--映射xml-->
    <bean name="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" p:typeAliasesPackage="com.accp.entity">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:xml/*.xml"/>
    </bean>

    <!--相当于StudentinfoDao studentinfoDao = session.getMapper(StudentinfoDao.class) 获取-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sessionFactory"/>
        <property name="basePackage" value="com.accp.dao"/>
    </bean>

    <!--声明式事务-->
    <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" p:dataSource-ref="dataSource"/>
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED"/>
            <tx:method name="update*"/>
            <tx:method name="delete*"/>
            <tx:method name="query*" propagation="NOT_SUPPORTED"/>
        </tx:attributes>
    </tx:advice>
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(* com.accp.service..*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
    </aop:config>

    <!--视图解析-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <mvc:annotation-driven/>

</beans>

entity学生实体类代码：

package com.accp.entity;


public class Studentinfo {

  private long sid;
  private String sname;
  private String sgender;
  private long sage;
  private String saddress;
  private String semail;


  public long getSid() {
    return sid;
  }

  public void setSid(long sid) {
    this.sid = sid;
  }


  public String getSname() {
    return sname;
  }

  public void setSname(String sname) {
    this.sname = sname;
  }


  public String getSgender() {
    return sgender;
  }

  public void setSgender(String sgender) {
    this.sgender = sgender;
  }


  public long getSage() {
    return sage;
  }

  public void setSage(long sage) {
    this.sage = sage;
  }


  public String getSaddress() {
    return saddress;
  }

  public void setSaddress(String saddress) {
    this.saddress = saddress;
  }


  public String getSemail() {
    return semail;
  }

  public void setSemail(String semail) {
    this.semail = semail;
  }

}

dao层StudentinfoDao代码：

package com.accp.dao;

import com.accp.entity.Studentinfo;

import java.util.List;

public interface StudentinfoDao {

    List<Studentinfo> queryStudent();

    int addStudentinfo(Studentinfo studentinfo);

    int deleteStudentinfo(Studentinfo studentinfo);

    int updateStudentinfo(Studentinfo studentinfo);

    Studentinfo getByStudentId(Studentinfo studentinfo);

}

resources下xml里Studentinfo.xml代码：

<?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.accp.dao.StudentinfoDao">

    <select id="queryStudent" resultType="Studentinfo">
        select * from studentinfo;
    </select>

    <select id="getByStudentId" resultType="Studentinfo">
        select * from studentinfo where sid = #{sid}
    </select>

    <insert id="addStudentinfo">
        insert into studentinfo value (default ,#{sname},#{sgender},#{sage},#{saddress},#{semail})
    </insert>

    <delete id="deleteStudentinfo">
        delete from studentinfo where sid = #{sid}
    </delete>

    <update id="updateStudentinfo">
        update studentinfo
        <trim prefix="set" suffixOverrides="," suffix="where sid=#{sid}">
            <if test="sname!=null">sname = #{sname},</if>
            <if test="sgender!=null">sgender = #{sgender},</if>
            <if test="sage!=null">sage = #{sage},</if>
            <if test="saddress!=null">saddress = #{saddress},</if>
            <if test="semail!=null">semail = #{semail},</if>
        </trim>
    </update>
</mapper>

service层StudentinfoService代码：

package com.accp.service;

import com.accp.entity.Studentinfo;

import java.util.List;

public interface StudentinfoService {

    List<Studentinfo> queryStudent();

    int addStudentinfo(Studentinfo studentinfo);

    int deleteStudentinfo(Studentinfo studentinfo);

    int updateStudentinfo(Studentinfo studentinfo);

    Studentinfo getByStudentId(Studentinfo studentinfo);

}

service层Impl实现类StudentinfoServiceImpl代码：

package com.accp.service.impl;

import com.accp.dao.StudentinfoDao;
import com.accp.entity.Studentinfo;
import com.accp.service.StudentinfoService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service
public class StudentinfoServiceImpl implements StudentinfoService {

    @Resource
    private StudentinfoDao studentinfoDao;

    public List<Studentinfo> queryStudent() {
        return studentinfoDao.queryStudent();
    }

    public int addStudentinfo(Studentinfo studentinfo) {
        return studentinfoDao.addStudentinfo(studentinfo);
    }

    public int deleteStudentinfo(Studentinfo studentinfo) {
        return studentinfoDao.deleteStudentinfo(studentinfo);
    }

    public int updateStudentinfo(Studentinfo studentinfo) {
        return studentinfoDao.updateStudentinfo(studentinfo);
    }

    public Studentinfo getByStudentId(Studentinfo studentinfo) {
        return studentinfoDao.getByStudentId(studentinfo);
    }
}

controller控制层StudentinfoController代码：

package com.accp.controller;

import com.accp.entity.Studentinfo;
import com.accp.service.StudentinfoService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.annotation.Resource;

@Controller
public class StudentinfoController {

    @Resource
    private StudentinfoService studentinfoService;

    @RequestMapping("/showList")
    public String showList(Model model){
        model.addAttribute("students",studentinfoService.queryStudent());
        return "index";
    }

    @RequestMapping("/JumpAdd")
    public String jumpAdd(){
        return "add";
    }

    @RequestMapping("/AddList")
    public String addList(Studentinfo studentinfo){
        studentinfoService.addStudentinfo(studentinfo);
        return "redirect:showList";
    }

    @RequestMapping("/DeleteS")
    public String deleteS(Studentinfo studentinfo){
        studentinfoService.deleteStudentinfo(studentinfo);
        return "redirect:showList";
    }

    @RequestMapping("/JumpUpdate")
    public String jumpUpdate(Studentinfo studentinfo,Model model){
        model.addAttribute("stu",studentinfoService.getByStudentId(studentinfo));
        return "update";
    }

    @RequestMapping("/UpdateS")
    public String updateS(Studentinfo studentinfo){
        studentinfoService.updateStudentinfo(studentinfo);
        return "redirect:showList";
    }
}

jsp页面代码：

显示页面(包含删除操作)：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<a href="JumpAdd">增加</a>
    <table width="100%" border="1">
        <tr>
            <td>编号</td>
            <td>姓名</td>
            <td>性别</td>
            <td>年龄</td>
            <td>地址</td>
            <td>email</td>
            <td colspan="2">操作</td>
        </tr>
        <c:forEach items="${students}" var="stu">
            <tr>
                <td>${stu.sid}</td>
                <td>${stu.sname}</td>
                <td>${stu.sgender}</td>
                <td>${stu.sage}</td>
                <td>${stu.saddress}</td>
                <td>${stu.semail}</td>
                <td><a href="DeleteS?sid=${stu.sid}">删除</a></td>
                <td><a href="JumpUpdate?sid=${stu.sid}">修改</a></td>
            </tr>
        </c:forEach>

    </table>

</body>
</html>

添加页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加</title>
</head>
<body>
<form action="AddList" method="post">
    姓名：<input type="text" name="sname"></br>
    性别：<input type="text" name="sgender"></br>
    年龄：<input type="text" name="sage"></br>
    地址：<input type="text" name="saddress"></br>
    邮箱：<input type="text" name="semail"></br>
    <input type="submit"  value="添加">
</form>
</body>
</html>

修改页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改</title>
</head>
<body>
<form action="UpdateS?sid=${stu.sid}" method="post">
    姓名：<input type="text" name="sname" value="${stu.sname}"></br>
    性别：<input type="text" name="sgender" value="${stu.sgender}"></br>
    年龄：<input type="text" name="sage" value="${stu.sage}"></br>
    地址：<input type="text" name="saddress" value="${stu.saddress}"></br>
    邮箱：<input type="text" name="semail" value="${stu.semail}"></br>
    <input type="submit" value="修改">
</form>
</body>
</html>

显示效果：