11 图书管理系统（SSM+LayUi）

1、DAO层接口和实现

• 在classInfoDao.java里写增删改接口

package com.gychen.dao;

import com.gychen.po.ClassInfo;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Component;

import java.util.List;

@Component("classDao")
public interface ClassInfoDao {
    /**
     * 查询所有图书类型信息
     */
//    @Select("select * from class_info")
//    List<ClassInfo> queryClassInfoAll();

    List<ClassInfo> queryClassInfoAll(@Param(value = "name")String name);


    /**
     * 添加图书类型
     */
    void addBookType(ClassInfo classInfo);

    /**
     * 修改 根据id查询记录信息
     */
    ClassInfo queryBookTypeById(Integer id);

    /**
     * 修改图书类型信息
     */
    void updateBookType(ClassInfo classInfo);

    /**
     * 删除 根据一个或多个id删除
     */
    void deleteBookTypeByIds(List<Integer> id);


}

• 在ClassInfoDao.xml里实现增删改语句

<?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.gychen.dao.ClassInfoDao" >

    <!-- 查询全部信息 -->
    <select id="queryClassInfoAll" resultType="com.gychen.po.ClassInfo">
        select * from class_info
        <where>
            <if test="name!=null">
                and name like '%${name}%'
            </if>
        </where>
    </select>

    <!-- 增加图书类型 -->
    <insert id="addBookType" parameterType="classInfo">
        insert into class_info (name,remarks) values (#{name},#{remarks})
    </insert>

    <!-- 根据id查询类型信息 -->
    <select id="queryBookTypeById" parameterType="int" resultType="classInfo">
        select * from class_info where id=#{id}
    </select>

    <!-- 修改图书类型信息 -->
    <update id="updateBookType" parameterType="classInfo">
        update class_info set name=#{name},remarks=#{remarks} where id=#{id}
    </update>

    <!-- 根据ids 删除图书类型信息 -->
    <delete id="deleteBookTypeByIds" parameterType="list">
        delete from class_info where id in 
        <foreach collection="list" item="ids" open="(" separator="," close=")">
            #{ids}
        </foreach>
    </delete>

</mapper>

2、service层接口和实现

• 在ClassInfoService里写增删改接口

package com.gychen.service;

import com.github.pagehelper.PageInfo;
import com.gychen.po.ClassInfo;

import java.util.List;

public interface ClassInfoService {
    /**
     * 查询所有的图书类型信息
     */
    PageInfo<ClassInfo> queryClassInfoAll(String name,int page,int limit);


    /**
     * 添加图书类型
     */
    void addBookType(ClassInfo classInfo);

    /**
     * 修改 根据id查询记录信息
     */
    ClassInfo queryBookTypeById(Integer id);

    /**
     * 修改图书类型信息
     */
    void updateBookType(ClassInfo classInfo);

    /**
     * 删除 根据一个或多个id删除
     */
    void deleteBookTypeByIds(List<Integer> ids);
}

• 在ClassInfoServiceImpl里实现增删改语句

package com.gychen.service;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.gychen.dao.ClassInfoDao;
import com.gychen.po.ClassInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service("classInfoService")
public class ClassInfoServiceImpl implements ClassInfoService {

    @Autowired
    private ClassInfoDao classDao;

    @Override
    public PageInfo<ClassInfo> queryClassInfoAll(String name,int page, int limit) {

        // 传入参数，每页条数，当前页
        PageHelper.startPage(page,limit);
        List<ClassInfo> list = classDao.queryClassInfoAll(name);
        // 通过包装获取分页需要的其他值
        PageInfo<ClassInfo> pageInfo = new PageInfo<>(list);

        return pageInfo;
    }

    @Override
    public void addBookType(ClassInfo classInfo) {
        classDao.addBookType(classInfo);
    }

    @Override
    public ClassInfo queryBookTypeById(Integer id) {
        return classDao.queryBookTypeById(id);
    }

    @Override
    public void updateBookType(ClassInfo classInfo) {
        classDao.updateBookType(classInfo);
    }

    @Override
    public void deleteBookTypeByIds(List<Integer> ids) {
        classDao.deleteBookTypeByIds(ids);
    }
}

3、Controller层实现

• 在TypeController里添加增删改

package com.gychen.controller;

import com.github.pagehelper.PageInfo;
import com.gychen.po.ClassInfo;
import com.gychen.service.ClassInfoService;
import com.gychen.util.RestResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import java.util.Arrays;
import java.util.List;

@Controller
public class TypeController {

    @Autowired
    private ClassInfoService classInfoService;  // 这里的classInfoService要和ClassInfoServiceImpl中的注解名字相同

    @RequestMapping("/typeIndex")
    public String typeIndex(){

        return "type/typeIndex";
    }

    /**
     * 添加页面的转换
     */
    @GetMapping("/typeAdd")
    public String typeAdd(){
        return "type/addType";
    }


    /**
     * 获取type数据信息 分页
     */
    @RequestMapping("/typeAll")
    @ResponseBody
    public RestResponse typeAll(String name, @RequestParam(defaultValue = "1") Integer page,
                                @RequestParam(defaultValue = "15") Integer limit){

        PageInfo<ClassInfo> pageInfo = classInfoService.queryClassInfoAll(name, page, limit);

        return RestResponse.ok(pageInfo.getList());
    }

    /**
     * 类型添加
     */
    @ResponseBody
    @RequestMapping("/addBookType")
    public RestResponse addBookType(ClassInfo classInfo){
        classInfoService.addBookType(classInfo);
        return RestResponse.ok();
    }

    /**
     * 根据id查询
     */
    @GetMapping("/queryBookTypeById")
    public String queryBookTypeById(Integer id, Model model){
        ClassInfo classInfo = classInfoService.queryBookTypeById(id);
        model.addAttribute("info",classInfo);
        return "type/updateType";
    }

    /**
     * 修改提交功能
     */
    @ResponseBody
    @RequestMapping("/updateBookType")
    public RestResponse updateBookType(@RequestBody ClassInfo classInfo){
        classInfoService.updateBookType(classInfo);
        return RestResponse.ok();
    }


    /**
     * 删除类型
     */
    @ResponseBody
    @RequestMapping("/deleteType")
    public RestResponse deleteType(String ids){
        List list = Arrays.asList(ids.split(","));
        classInfoService.deleteBookTypeByIds(list);
        return RestResponse.ok();
    }

}