【Mybatis】简单的mybatis增删改查模板

简单的mybatis增删改查模板：

<?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.suneee.scn.chtpub.wms.dao.UserDao">

    <select id="queryPage" resultType="com.suneee.scn.chtpub.wms.model.UserDO" parameterType="java.util.Map">

         SELECT
                id as id,
                whid as whid,
                userid as userid,
                usercode as usercode,
                department as department
         FROM
                sp_users
         WHERE
                1 = 1
        <if test="whid !=null  and whid != '' ">
            AND whid = #{whid,jdbcType=VARCHAR}
        </if>

        <if test="userid !=null  and userid != '' ">
            AND userid = #{userid,jdbcType=VARCHAR}
        </if>
        <if test="usercode !=null  and usercode != '' ">
            AND usercode = #{usercode,jdbcType=VARCHAR}
        </if>

        <if test="department !=null  and department != '' ">
            AND department = #{department,jdbcType=VARCHAR}
        </if>

        limit #{pageSize,jdbcType=NUMERIC} offset #{start,jdbcType=NUMERIC}
    </select>

    <select id="getModelTotal" resultType="int" parameterType="java.util.Map">

        SELECT
                count(1)
         FROM
                sp_users
         WHERE
                1 = 1
        <if test="whid !=null  and whid != '' ">
            AND whid = #{whid,jdbcType=VARCHAR}
        </if>

        <if test="userid !=null  and userid != '' ">
            AND userid = #{userid,jdbcType=VARCHAR}
        </if>
        <if test="usercode !=null  and usercode != '' ">
            AND usercode = #{usercode,jdbcType=VARCHAR}
        </if>

        <if test="department !=null  and department != '' ">
            AND department = #{department,jdbcType=VARCHAR}
        </if>
    </select>

    <select id="checkListIfExist" resultType="com.suneee.scn.chtpub.wms.model.UserDO" parameterType="java.util.Map">

         SELECT
                usercode as usercode
         FROM
                sp_users
         WHERE
                1=1
        <if test="usercode !=null  and usercode != '' ">
             AND usercode = #{usercode,jdbcType=VARCHAR}
        </if>
    </select>

    <insert id="insertModel" parameterType="java.util.Map">

         INSERT INTO sp_users
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="whid != null and whid != '' ">
                whid,
            </if>
            <if test="userid != null and userid != '' ">
                userid,
            </if>
            <if test="usercode != null and usercode != '' ">
                usercode,
            </if>
            <if test="department != null and department != '' ">
                department,
            </if>

        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">

            <if test="whid != null and whid != '' ">
                #{whid,jdbcType=VARCHAR},
            </if>
            <if test="userid != null and userid != '' ">
                #{userid,jdbcType=VARCHAR},
            </if>
            <if test="usercode != null and usercode != '' ">
                #{usercode,jdbcType=VARCHAR},
            </if>
            <if test="department != null and department != '' ">
                #{department,jdbcType=VARCHAR},
            </if>

        </trim>
    </insert>

    <delete id="deleteModel" parameterType="java.lang.Integer">
         DELETE FROM
               sp_users
         WHERE
               id = #{id,jdbcType=NUMERIC}
    </delete>

    <select id="initQuery" parameterType="java.lang.Integer" resultType="com.suneee.scn.chtpub.wms.model.UserDO">
         SELECT
                id,
                whid,
                userid,
                usercode,
                department
         FROM
                sp_users
         WHERE
                1 = 1
         AND    id = #{id,jdbcType=NUMERIC}

  </select>

  <update id="updateModel" parameterType="java.util.Map">
        UPDATE
                sp_users
        SET
                whid = #{whid,jdbcType=VARCHAR},
                <!-- userid = #{userid,jdbcType=VARCHAR}, -->
                usercode = #{usercode,jdbcType=VARCHAR},
                department = #{department,jdbcType=VARCHAR}

        WHERE
                1=1
        AND
                id = #{id,jdbcType=NUMERIC}

  </update>

</mapper>

简单的单表CRUD，parameterType和resultType都可以用实体Model代替，自动映射。

复杂多表的CRUD，parameterType要用map，在service里面要设置好对应的map K-V值，result一般用自定义的映射resultMap，里面定义了不同表字段对应的一个大Bean的映射，这里不能用resultType了！例如：

<resultMap id="BaseResultMap" type="com.suneee.scn.chtpub.wms.model.SuppCargoDO">
        <id column="workqid" property="workqid" jdbcType="VARCHAR" />
        <result column="description" property="description" jdbcType="VARCHAR" />
        <result column="itemnumber" property="itemnumber" jdbcType="VARCHAR" />
        <result column="whid" property="whid" jdbcType="VARCHAR" />
        <result column="locationid" property="locationid" jdbcType="VARCHAR" />
        <result column="workstatus" property="workstatus" jdbcType="VARCHAR" />
        <result column="qty" property="qty" jdbcType="NUMERIC" />
        <result column="zone" property="zone" jdbcType="VARCHAR" />
        <result column="employeeid" property="employeeid" jdbcType="VARCHAR" />
        <result column="datedue" property="datedue" jdbcType="VARCHAR" />
    </resultMap>

service层的代码：

package com.suneee.scn.chtpub.wms.service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.alibaba.dubbo.common.json.JSONObject;
import com.suneee.scn.chtpub.wms.common.util.DictUtil;
import com.suneee.scn.chtpub.wms.common.util.Page;
import com.suneee.scn.chtpub.wms.dao.UserDao;
import com.suneee.scn.chtpub.wms.model.DictionaryDO;
import com.suneee.scn.chtpub.wms.model.UserDO;
import com.suneee.scn.chtpub.wms.model.UserSearchDTO;

@Service("userService")
public class UserService {

    @Autowired
    UserDao userDao;

    public int updateModel(UserDO bean) {
        Map<String,Object> reqMap = new HashMap<String, Object>();
        reqMap.put("id",bean.getId());
        reqMap.put("whid",bean.getWhid());
        // reqMap.put("userid",bean.getUserid());
        reqMap.put("usercode",bean.getUsercode());
        reqMap.put("department",bean.getDepartment());
        int result = userDao.updateModel(reqMap);
        return result;
    }

    public UserDO initQuery(int id) {
        return userDao.initQuery(id);
    }

    public void deleteModel(Integer id) {
         Map<String, Object> reqMap = new HashMap<String, Object>();
         reqMap.put("id",id);
         userDao.deleteModel(reqMap);
    }

    public int insertModel(UserDO bean) {
        Map<String, Object> reqMap = new HashMap<String, Object>();
        reqMap.put("whid",bean.getWhid());
        reqMap.put("userid",bean.getUserid());
        reqMap.put("usercode",bean.getUsercode());
        reqMap.put("department",bean.getDepartment());

        return userDao.insertModel(reqMap);
    }

    public List<UserDO> checkListIfExist(JSONObject reqJson) {
        Map<String, Object> reqMap = new HashMap<String, Object>();
        String checkcode = reqJson.getString(DictUtil.User_ID);

        reqMap.put("usercode", checkcode);
        return userDao.checkListIfExist(reqMap);
    }

    public Page<UserDO> queryPage(Page<UserDO> page, UserSearchDTO bean) {
        int pageNo = page.getPageNo();
        int pageSize = page.getPageSize(); // 页大小
        int start = (pageNo -1)*pageSize;

       Map<String,Object> reqMap = new HashMap<String, Object>();

        reqMap.put("start", start);
        reqMap.put("pageSize", pageSize);

        reqMap.put("whid",bean.getWhid());
        reqMap.put("userid",bean.getUserid());
        reqMap.put("usercode",bean.getUsercode());
        reqMap.put("department",bean.getDepartment());

        List<UserDO> listIfExist = userDao.queryPage(reqMap);

        page.setResults(listIfExist);

        int totalCount = userDao.getModelTotal(reqMap);

        page.setTotalCount(totalCount); // 总条数
        int totalPageCount =totalCount%pageSize==0?totalCount/pageSize:totalCount/pageSize+1;
        page.setPageCount(totalPageCount);
        return page;

    }
}