用ssm写一个web的增删改查

编程语言 2018-08-11 20:16:12 阅读次数: 0

用ssm写一个web的增删改查

如果不想自己写的话，这里有完整的项目连接

链接：https://pan.baidu.com/s/1YnAyGy7Hpxoyma5sqGFX8Q 密码：lwdh

项目结构

这里写图片描述

每个包下包含哪些文件如下图

这里写图片描述

首先写

application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/itcast
//itcast是你的数据库名
spring.datasource.username=root

spring.datasource.password=123456

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

mybatis.config-location=classpath:Mybatis-config.xml
//这条信息是关于Mybatis的总配置文件的路径

第二写总配置文件

Mybatis-config.xml

<?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">
//总配置文件的规则

<configuration>

<typeAliases>
        <typeAlias alias="Clazz" type="com.gxj.model.Clazz"/>
        <typeAlias alias="Student" type="com.gxj.model.Student"/>

</typeAliases>

<mappers>

     <mapper resource="com/gxj/model/Clazz.xml"></mapper>
     //分文件Clazz.xml的路径

     <mapper resource="com/gxj/model/Student.xml"></mapper>
</mappers>
    //分文件Student.xml的路径


</configuration>

Clazz.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.gxj.dao.ClassDao">

<insert id="InsertClass" parameterType="Clazz">

   insert into class (name,size) values(#{name},#{size})

</insert>

<select id="SelectClass" resultType="Clazz">

   select * from class

</select>

<delete id="DeleteClass" parameterType="int">

   delete from class where id=#{id}

</delete>

<update id="UpdateClass" parameterType="Clazz">

   update class set name=#{name},size=#{size} where id=#{id}

</update>

<select id="SelectClassById" resultType="Clazz">

  select * from class where id=#{id}

</select>

</mapper>

Student.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.gxj.dao.StudentDao">

<resultMap type="Student" id="m1">

<id column="id" property="id"/>

<result column="name" property="name"/>

<result column="age" property="age"/>

<result column="sex" property="sex"/>

<result column="cid" property="cid"/>

<association property="clazz" javaType="Clazz"   column="cid"  select="SelectClassByCid"></association>


</resultMap>

<select id="SelectClassByCid" parameterType="int" resultType="Clazz">

 select * from Class where id=#{cid}

</select>

<select id="SelectStudent" resultMap="m1">

      select * from student

</select>

<delete id="DeleteStudentByCid" parameterType="int">

  delete from Student where cid=#{cid}

</delete>

<insert id="InsertStudent" parameterType="Student">

   insert into student (name,age,sex,cid) values(#{name},#{age},#{sex},#{cid})

</insert>

<select id="SelectStudentById" parameterType="int" resultType="Student">

   select * from student where id=#{id}

</select>

<delete id="DeleteStudentById" parameterType="int">

  delete from Student where id=#{id}

</delete>

<update id="UpdateStudent" parameterType="Student">

  update student set name=#{name},age=#{age},sex=#{sex},cid=#{cid} where id=#{id}

</update>

</mapper>

第三包内文件

com.gxj.medol下

Clazz.java

package com.gxj.model;

public class Clazz {

private Integer id;

private String name;

private Integer size;

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public Integer getSize() {
    return size;
}

public void setSize(Integer size) {
    this.size = size;
}

}

Student.java

package com.gxj.model;

public class Student {

private Integer id;

private String name;

private Integer age;

private Integer sex;

private Integer cid;

private Clazz clazz;

public Clazz getClazz() {
    return clazz;
}

public void setClazz(Clazz clazz) {
    this.clazz = clazz;
}

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public Integer getAge() {
    return age;
}

public void setAge(Integer age) {
    this.age = age;
}

public Integer getSex() {
    return sex;
}

public void setSex(Integer sex) {
    this.sex = sex;
}

public Integer getCid() {
    return cid;
}

public void setCid(Integer cid) {
    this.cid = cid;
}

}

com.gxj.dao

ClassDao.java

package com.gxj.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import com.gxj.model.Clazz;
@Mapper
public interface ClassDao {

public int InsertClass(Clazz clazz);

public List<Clazz> SelectClass();

public int DeleteClass(Integer id);

public int UpdateClass(Clazz clazz);

public Clazz SelectClassById(Integer id);

}

StudentDao.java

package com.gxj.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import com.gxj.model.Student;

@Mapper
public interface StudentDao {

public int DeleteStudentByCid(Integer cid);

public int InsertStudent(Student student);

public List<Student> SelectStudent();

public int DeleteStudentById(Integer id);

public int UpdateStudent(Student student);

public Student SelectStudentById(Integer id);

}

com.gxj.controller

ClassController.java

package com.gxj.controller;

import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.gxj.biz.ClassBiz;
import com.gxj.model.Clazz;

@Controller
public class ClassController {
@Resource
private ClassBiz biz;
@RequestMapping("/AddClass")
public String AddClass(Clazz clazz) {

    boolean flag = biz.InsertClass(clazz);

    if(flag) {

        return "redirect:/Success.html";

    }else {

        return "redirect:/Error.html";

    }

}

@RequestMapping("/SelectClass")
public String SelectClass(HttpServletRequest request) {

    List<Clazz> list = biz.SelectClass();

    request.setAttribute("list", list);

    return "ShowClass.jsp";
}
@RequestMapping("/DeleteClass")
public String DeleteClass(@RequestParam(value="id") int id) {

    boolean flag = biz.DeleteClass(id);

    if(flag) {

        return "redirect:/Success.html";

    }else {

        return "redirect:/Error.html";

    }

}
@RequestMapping("/UpdateClassById")
public String FUdateClass(@RequestParam(value="id") int id,HttpServletRequest request) {

    Clazz clazz = biz.SelectClassById(id);

    request.setAttribute("clazz", clazz);

    return "UpdateClass.jsp";

}

@RequestMapping("/UpdateClass")
public String UpdateClass(Clazz clazz){

    boolean flag = biz.UpdateClass(clazz);

    if(flag) {

        return "redirect:/Success.html";

    }else {

        return "redirect:/Error.html";

    }

}

}

StudentController.java

package com.gxj.controller;

import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.gxj.biz.ClassBiz;
import com.gxj.biz.StudentBiz;
import com.gxj.model.Clazz;
import com.gxj.model.Student;

@Controller
public class StudentController {
@Resource
private StudentBiz sbiz;

@Resource

private ClassBiz biz;
@RequestMapping("/InsertStudent")
public String InsertStudent(Student student) {

    boolean flag = sbiz.InsertStudent(student);

    if(flag) {

        return "redirect:/Success.html";

    }else {

        return "redirect:/Error.html";

    }

}
@RequestMapping("/GetAllClass")
public String GetAllClass(HttpServletRequest request) {

    List<Clazz> list = biz.SelectClass();

    request.setAttribute("list", list);

    return "AddStudent.jsp";

}
@RequestMapping("/SelectStudent")
public String SelectStudent(HttpServletRequest request) {

    List<Student> list = sbiz.SelectStudent();

    request.setAttribute("list", list);

    return "ShowStudent.jsp";

}
@RequestMapping("/DeleteStudent")
public String DeleteStudent(Integer id) {

    boolean flag = sbiz.DeleteStudent(id);

    if(flag) {

        return "redirect:/Success.html";

    }else {

        return "redirect:/Error.html";

    }

}
@RequestMapping("/FUpdateStudent")
public String UpdateStudent(Student student) {

    boolean flag = sbiz.UpdateStudent(student);

    if(flag) {

        return "redirect:/Success.html";

    }else {

        return "redirect:/Error.html";

    }

}
@RequestMapping("/SelectStudentById")
public String SelectStudentById(@RequestParam(value="id") int id,HttpServletRequest request) {

    Student student = sbiz.SelectStudentById(id);

    List<Clazz> list = biz.SelectClass();

    request.setAttribute("student", student);

    request.setAttribute("list", list);

    return "UpdateStudent.jsp";

}

}

com.gxj.biz

ClassBiz.java

package com.gxj.biz;

import java.util.List;

import com.gxj.model.Clazz;

public interface ClassBiz {

public boolean InsertClass(Clazz clazz);

public List<Clazz> SelectClass();

public boolean DeleteClass(Integer id);

public boolean UpdateClass(Clazz clazz);

public Clazz SelectClassById(Integer id);

}

ClassBizImpl.java

package com.gxj.biz;

import java.util.List;

import javax.annotation.Resource;


import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.gxj.dao.ClassDao;
import com.gxj.dao.StudentDao;
import com.gxj.model.Clazz;
@Service
public class ClassBizImpl implements ClassBiz {

@Resource
private ClassDao dao;
@Resource
private StudentDao sdao;
@Override
public boolean InsertClass(Clazz clazz) {
    // TODO Auto-generated method stub

    boolean flag = false;

    int rows = dao.InsertClass(clazz);

    if(rows>0) {

        flag = true;

    }

    return flag;
}
@Override
public List<Clazz> SelectClass() {
    // TODO Auto-generated method stub

    return dao.SelectClass();
}

@Transactional(propagation=Propagation.REQUIRED)
@Override
public boolean DeleteClass(Integer id) {
    // TODO Auto-generated method stub

    boolean flag = false;

    sdao.DeleteStudentByCid(id);

    int rows1 = dao.DeleteClass(id);

    if(rows1>0) {

        flag = true;

    }

    return flag;
}
@Override
public boolean UpdateClass(Clazz clazz) {
    // TODO Auto-generated method stub

    boolean flag = false;

    int rows = dao.UpdateClass(clazz);

    if(rows>0) {

        flag = true;

    }

    return flag;
}
@Override
public Clazz SelectClassById(Integer id) {
    // TODO Auto-generated method stub


    return dao.SelectClassById(id);
}

}

StudentBiz.java

package com.gxj.biz;

import java.util.List;

import com.gxj.model.Student;

public interface StudentBiz {

public boolean InsertStudent(Student student);

public List<Student> SelectStudent();

public boolean DeleteStudent(Integer id);

public boolean UpdateStudent(Student student);

public Student SelectStudentById(Integer id);

}

StudentBizImpl.java

package com.gxj.biz;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.gxj.dao.StudentDao;
import com.gxj.model.Student;
@Service
public class StudentBizImpl implements StudentBiz {

@Resource
private StudentDao dao;
@Override
public boolean InsertStudent(Student student) {
    // TODO Auto-generated method stub

    boolean flag = false;

    int rows = dao.InsertStudent(student);

    if(rows>0) {

        flag = true;

    }

    return flag;
}
@Override
public List<Student> SelectStudent() {
    // TODO Auto-generated method stub

    return dao.SelectStudent();
}
@Override
public boolean DeleteStudent(Integer id) {
    // TODO Auto-generated method stub

    boolean flag = false;

    int rows = dao.DeleteStudentById(id);

    if(rows>0) {

        flag = true;

    }

    return flag;
}
@Override
public boolean UpdateStudent(Student student) {
    // TODO Auto-generated method stub

    boolean flag = false;

    int rows = dao.UpdateStudent(student);

    if(rows>0) {

        flag = true;

    }

    return flag;

}
@Override
public Student SelectStudentById(Integer id) {
    // TODO Auto-generated method stub

    return dao.SelectStudentById(id);
}

}

放jsp和HTML页面

这里写图片描述

AddClass.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<form action="AddClass" method="post">
班级名称:<input type="text" name="name"><br>
班级容量:<input type="number" name="size"><br>
<input type="submit" value="提交">
</form>
</body>
</html>

AddStudent.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@page import="com.gxj.model.Clazz" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<form action="InsertStudent" method="post">
学生姓名:<input type="text" name="name"><br>
学生年龄:<input type="number" name="age"><br>
学生性别:<input type="radio" name="sex" value="0">女<input type="radio" name="sex" value="1" checked>男<br>

所在班级:

<option value="-1">请选择</option>
<c:forEach items="${requestScope.list }" var="item">
<option value="${item.id }">${item.name}</option>
</c:forEach>
</select>

<br>
<input type="submit" value="提交">
</form>
</body>
</html>

Error.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<div>操作失败</div>
</body>
</html>

Success.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>


<div>操作成功</div>
</body>
</html>

ShowClass.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<table>

<tr>

<th>班级名称</th>

<th>班级容量</th>

<th>操作</th>

</tr>

<c:forEach items="${requestScope.list }" var="item">

<tr>

<td>${item.name }</td>

<td>${item.size }</td>

<td><a href="DeleteClass?id=${item.id }" style="margin-left: 10px">删除</a><a href="UpdateClassById?id=${item.id }" style="margin-left: 10px">更新</a></td>

</tr>

</c:forEach>

</table>
</body>
</html>

ShowStudent.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<table>

<tr>

<th>学生姓名</th>

<th>学生年龄</th>

<th>学生性别</th>

<th>所在班级</th>

<td>操作</td>

<c:forEach items="${requestScope.list }" var="item">

</tr>

<td>${item.name}</td>

<td>${item.age}</td>

<c:if test="${item.sex==0}">
<td>女</td>
</c:if>

<c:if test="${item.sex==1}">
<td>男</td>
</c:if>


<td>${item.clazz.name}</td>

<td><a href="DeleteStudent?id=${item.id }" style="margin-left: 10px">删除</a><a href="SelectStudentById?id=${item.id }" style="margin-left: 10px">更新</a></td>

</tr>

</c:forEach>

</table>
</body>
</html>

UpdateClass.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ut-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<form action="UpdateClass" method="post">
<input type="hidden" name="id" value="${requestScope.clazz.id }">
班级名称:<input type="text" name="name" value="${requestScope.clazz.name }"><br>
班级容量:<input type="number" name="size" value="${requestScope.clazz.size }"><br>
<input type="submit" value="提交">
</form>
</body>
</html>

UpdateStudent.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<div><a href="AddClass.jsp" style="margin-left: 10px">添加班   级</a><a href="SelectClass" style="margin-left: 10px">查看班级</a><a href="GetAllClass" style="margin-left: 10px">添加学员</a><a href="SelectStudent" style="margin-left: 10px">查看学员</a></div>

<form action="FUpdateStudent" method="post">
<input type="hidden" name="id" value="${requestScope.student.id }">
学生姓名:<input type="text" name="name" value="${requestScope.student.name }"><br>
学生年龄:<input type="number" name="age" value="${requestScope.student.age }"><br>
学生性别:
<c:if test="${requestScope.student.sex==0 }">
   <input type="radio" name="sex" value="0" checked>女
</c:if>
<c:if test="${requestScope.student.sex!=0 }">
   <input type="radio" name="sex" value="0">女
</c:if>
<c:if test="${requestScope.student.sex==1 }">
   <input type="radio" name="sex" value="1" checked>男
</c:if>
<c:if test="${requestScope.student.sex!=1 }">
   <input type="radio" name="sex" value="1">男
</c:if>
所在班级:<select name="cid">

<option value="-1">请选择</option>
<c:forEach items="${requestScope.list }" var="item">
<c:if test="${item.id== requestScope.student.cid}">

猜你喜欢

转载自blog.csdn.net/Stay_Hungry_Stay/article/details/81561040
今日推荐
TIOBE 5 月榜单：Fortran “复活”进入 Top 10
GCC 14.1 发布
面壁智能发布 Eurux-8x22B 开源大模型 —— 堪称「理科状元」
开源日报 | 谷歌扶持鸿蒙上位；开源Rabbit R1；Docker加持的安卓手机；微软的焦虑和野心；海尔电器把开放平台关了
中国码农的“35岁魔咒”
蘭雅 CorelDRAW 插件 2024.5.1 国际劳动节版，免费下载
Arc Browser for Windows 1.0 正式 GA
90后程序员开发视频搬运软件、不到一年获利超 700 万，结局很刑！
周排行
Java自定义时间格式
同步整形电路
在开发中最最最常用的字符串的属性大集合
Linux 查看端口占用并杀掉
Java基础四：ArrayList
多线程之死锁就是这么简单
mysql 基础命令集
awk 命令详解
Centos6.3编译安装nginx+php步骤
OCR （Optical Character Recognition，光学字符识别）
每日归档
更多
2024-05-08(42)
2024-05-07(14)
2024-05-06(40)
2024-05-05(0)
2024-05-04(7)
2024-05-03(19)
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022