ssm 框架实现增删改查CRUD操作（Spring + SpringMVC + Mybatis 实现增删改查）

SpringBoot 项目整合

一、项目准备

1.1 ssm 框架环境搭建

博客地址：ssm项目框架搭建

1.2 项目结构图如下

1.3 数据表结构图如下

CREATE TABLE `department` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  `sn` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;

1.4 运行结果

二、项目实现

1. EmployeeController 控制器

package com.yy.homework.web.controller;

import com.github.pagehelper.PageInfo;
import com.yy.homework.anno.RequiredPermission;
import com.yy.homework.domain.Department;
import com.yy.homework.qo.DepartmentPageObject;
import com.yy.homework.service.IDepartmentService;
import com.yy.homework.service.IDepartmentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/department")
public class DepartmentController {
    @Autowired
    private IDepartmentService departmentService;

    @RequestMapping("/list")
    @RequiredPermission(name = "部门查询", expression = "department:list")
    public String selectAll(Model model, @ModelAttribute("qo")DepartmentPageObject qo) {
    	// Mybatis分页插件 PageHelper
    	//qo：页面模糊查询传入的值和分页查询传入的当前页和每页条数分装成 DepartmentPageObject 对象
        PageInfo<Department> pageInfo = departmentService.selectForList(qo);
        model.addAttribute("pageInfo", pageInfo);
        return "department/list";
    }

    @RequestMapping("/input")
    @RequiredPermission(name = "部门新增或修改", expression = "department:saveOrUpdate")
    public String input(Department department, Model model) {
        if (department.getId() != null) {
            Department e = departmentService.selectById(department.getId());
            model.addAttribute("department", e);
        }
        return "department/input";
    }

    @RequestMapping("/saveOrUpdate")
    @RequiredPermission(name = "部门新增或修改", expression = "department:saveOrUpdate")
    public String saveOrUpdate(Department department) {
        if (department.getId() != null) {
            departmentService.update(department);
        } else {
            departmentService.insert(department);
        }
        return "redirect:/department/list";
    }

    @RequestMapping("/delete")
    @RequiredPermission(name = "部门删除", expression = "department:delete")
    public String delete(Long id) {
        departmentService.delete(id);
        return "redirect:/department/list";
    }
}

2. IDepartmentService 接口

package com.yy.homework.service;

import com.github.pagehelper.PageInfo;
import com.yy.homework.domain.Department;
import com.yy.homework.domain.Department;
import com.yy.homework.qo.DepartmentPageObject;

import java.util.List;

public interface IDepartmentService {

    void insert(Department department);

    void delete(Long id);

    void update(Department department);

    Department selectById(Long id);

    PageInfo<Department> selectForList(DepartmentPageObject qo);

    List<Department> selectAll();
}

3. DepartmentServiceImpl 接口实现类

package com.yy.homework.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.yy.homework.domain.Department;
import com.yy.homework.domain.Department;
import com.yy.homework.mapper.DepartmentMapper;
import com.yy.homework.qo.DepartmentPageObject;
import com.yy.homework.service.IDepartmentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class DepartmentServiceImpl implements IDepartmentService {
    @Autowired
    private DepartmentMapper departmentMapper;

    @Override
    public void insert(Department department) {
        departmentMapper.insert(department);
    }

    @Override
    public void delete(Long id) {
        departmentMapper.deleteByPrimaryKey(id);
    }

    @Override
    public void update(Department department) {
        departmentMapper.updateByPrimaryKey(department);
    }

    @Override
    public Department selectById(Long id) {
        return departmentMapper.selectByPrimaryKey(id);
    }

    @Override
    public PageInfo<Department> selectForList(DepartmentPageObject qo) {
        // 使用分页插件，传入当前页，每页显示数量
        PageHelper.startPage(qo.getCurrentPage(), qo.getPageSize());
        List<Department> department = departmentMapper.selectForList(qo);
        return new PageInfo<>(department);
    }

    @Override
    public List<Department> selectAll() {
        return departmentMapper.selectAll();
    }

}

4. DepartmentMapper 接口

package com.yy.homework.mapper;

import com.yy.homework.domain.Department;
import com.yy.homework.qo.DepartmentPageObject;

import java.util.List;

public interface DepartmentMapper {
    int deleteByPrimaryKey(Long id);

    int insert(Department record);

    Department selectByPrimaryKey(Long id);

    List<Department> selectForList(DepartmentPageObject qo);

    int updateByPrimaryKey(Department record);

    List<Department> selectAll();
}

5. DepartmentMapper.xml

<mapper namespace="com.yy.homework.mapper.DepartmentMapper" >
  <resultMap id="BaseResultMap" type="com.yy.homework.domain.Department" >
    <id column="id" property="id" />
    <result column="name" property="name" />
    <result column="sn" property="sn" />
  resultMap>
  <delete id="deleteByPrimaryKey" >
    delete from department
    where id = #{id}
  delete>
  <insert id="insert" useGeneratedKeys="true" keyProperty="id" >
    insert into department (name, sn)
    values (#{name}, #{sn})
  insert>
  <update id="updateByPrimaryKey" >
    update department
    set name = #{name},
      sn = #{sn}
    where id = #{id}
  update>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" >
    select id, name, sn
    from department
    where id = #{id}
  select>
  <select id="selectForList" resultMap="BaseResultMap" >
    select id, name, sn
    from department
  select>
    <select id="selectAll" resultMap="BaseResultMap">
      select id, name, sn
      from department
    select>
mapper>

6. list.ftl 页面（可以不使用 FreeMarker 模板，自己定义）

<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>部门管理title>
    
    <#include "/common/link.ftl">

    <script>
        $(function () {
            /* 添加 */
            $('.btn-input').click(function () {
                let tr = this.parentNode.parentNode;
                console.log(tr);
                if (tr.childNodes[1].innerText) {
                    $('input[name=id]').val(tr.childNodes[1].innerText);
                    $('input[name=name]').val(tr.childNodes[5].innerText);
                    // console.log($('#exampleInputEmail1').val());
                    $('input[name=sn]').val(tr.childNodes[7].innerText);
                }
                $('.modal').modal('show'); //官方文档中表示通过该方法即可弹出模态框
            });
            /*$('.btn-input').click(function () {
                $('.modal').modal('show'); //官方文档中表示通过该方法即可弹出模态框
            });*/
        });

    script>

head>
<body class="hold-transition skin-black sidebar-mini">

<div class="wrapper">
    <#include "/common/navbar.ftl">
    
    <#assign currentMenu="department"/>

    <#include "/common/menu.ftl">
    <div class="content-wrapper">
        <section class="content-header">
            <h1>部门管理h1>
        section>
        <section class="content">
            <div class="box">
                
                <form class="form-inline" id="searchForm" action="/department/list" method="post">
                    <input type="hidden" name="currentPage" id="currentPage" value="1">
                    <a href="#" class="btn btn-success btn-input" style="margin: 10px">
                        <span class="glyphicon glyphicon-plus">span> 添加
                    a>
                form>
                
                <div class="box-body table-responsive ">
                    <table class="table table-hover table-bordered table-striped">
                        <thead>
                        <tr>
                            <th>编号th>
                            <th>部门名称th>
                            <th>部门缩写th>
                            <th>操作th>
                        tr>
                        thead>
                        <tbody>
                        <#list pageInfo.list as department>
                            <tr>
                                <td style="display: none">${department.id}td>
                                <td>${department_index + pageInfo.startRow}td>
                                <td>${department.name}td>
                                <td>${department.sn}td>
                                <td>
                                    <a href="#" class="btn btn-info btn-xs btn-input">
                                        <span class="glyphicon glyphicon-pencil">span> 编辑
                                    a>
                                    <a class="btn btn-danger btn-xs btn-delete" data-url="/department/delete?id=${department.id}">
                                        <span class="glyphicon glyphicon-trash">span> 删除
                                    a>
                                td>
                            tr>
                        #list>

                        tbody>
                    table>
                    
                    <#include "/common/page.ftl" >
                div>
            div>
        section>
    div>
    <#include "/common/footer.ftl" >

    <div class="modal fade" tabindex="-1" role="dialog">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span
                                aria-hidden="true">×span>
                    button>
                    <h4 class="modal-title">添加/修改部门h4>
                div>
                <form action="/department/saveOrUpdate" method="post">
                    <input type="hidden" name="id">
                    <div class="modal-body">
                        <div class="form-group">
                            <label for="exampleInputEmail1">部门名称label>
                            <input type="text" name="name" class="form-control" id="exampleInputEmail1"
                                   placeholder="部门名称">
                        div>
                        <div class="form-group">
                            <label for="exampleInputPassword1">部门缩写label>
                            <input type="text" name="sn" class="form-control" id="exampleInputPassword1"
                                   placeholder="部门编号">
                        div>
                    div>
                    <div class="modal-footer">
                        <button type="submit" class="btn btn-primary">保存button>
                        <button type="button" class="btn btn-default" data-dismiss="modal">关闭button>
                    div>
                form>
            div>
        div>
    div>
div>
body>
html>

总结

以上就是 ssm 框架实现增删改查的操作了，代码仅供参考，欢迎讨论交流。
SpringBoot 项目搭建详细介绍请看我下一篇博客
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