SSM (MyBatis + Spring + SpringMVC) Oracle Stored Procedures Application combat

      Stored procedures can make our database operation efficiency becomes higher, because the stored procedure is translated well in advance. Unlike anything we send a SQL, each time to go through the series of steps (Syntax check - semantic analysis - compile - Cache - execution), Then use the stored procedure is executed directly compiled content, which will help improve system performance, especiallyIn the case of high concurrency of this effect should be most pronouncedof. Then the next I'll share with you how I use Oracle stored procedures it! 文中的JdbcType与相应的JavaType可参照我的另一篇博客：jdbcType with the Java type corresponding relationship table

1. query data

1.1 Definitions package and stored procedures

--定义package
CREATE OR REPLACE PACKAGE pk_rainQuality IS
    TYPE rainQuality_cursor IS REF CURSOR;
END pk_rainQuality;

--定义存储过程
CREATE OR REPLACE PROCEDURE getRainQulity
(
   startIndex IN NUMBER,
   maxIndex IN NUMBER,
   r_rainQulity OUT pk_rainQuality.rainQuality_cursor
) AS
BEGIN
    --分页查询语句
    OPEN r_rainQulity FOR
        SELECT * FROM (
         SELECT q1.*,ROWNUM rownum_ FROM(
            SELECT * FROM rainQuality
            ORDER BY monitorTime DESC
        ) q1 WHERE ROWNUM<=maxIndex
   ) q2 WHERE rownum_>startIndex;
END;

1.2 business logic code implementation, using Map and returns the result set to hold parameters

package com.qingyun.rainQuality.service;

import com.qingyun.rainQuality.dao.RainQualityMapper;
import com.qingyun.rainQuality.pojo.RainQuality;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;

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

@Service
public class RainQualityServiceImpl implements RainQualityService{

    @Resource
    RainQualityMapper rainQualityMapper;

    /**
     * 获取总记录数
     */
    @Override
    public Integer getRainQualityCount() {

        HashMap<String,Object> map=new HashMap<String,Object>();

        rainQualityMapper.getRainQualityCount(map);

        return (Integer) map.get("count");
    }

    /**
     * 获取所有雨量信息记录
     *
     * @param startIndex
     * @param maxIndex
     */
    @Override
    public List<RainQuality> getRainQualityList(Integer startIndex, Integer maxIndex) {

        HashMap<String,Object> map=new HashMap<String,Object>();

        map.put("startIndex", startIndex);
        map.put("maxIndex", maxIndex);

        rainQualityMapper.getRainQualityList(map);

        return (List<RainQuality>) map.get("rainQuality");
    }
}

1.3 DAO interface layer Mapper

package com.qingyun.rainQuality.dao;

import org.apache.ibatis.annotations.Param;

import java.util.Map;

public interface RainQualityMapper {

    /**
     * 获取总记录数
     * @param map
     */
    public void getRainQualityCount(@Param("map")Map<String,Object> map);

    /**
     * 获取所有雨量信息记录
     * @param map
     */
    public void getRainQualityList(@Param("map")Map<String,Object> map);
}

1.4 mapping file, write resultMap for establishing a mapping relationship between property values ​​and column names, stored procedure calls

<?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.qingyun.rainQuality.dao.RainQualityMapper">
    <!--定义一个列名与属性名之间的映射关系-->
    <resultMap id="rainQualityMap" type="RainQuality">
        <id property="id" column="id"/>
        <result property="districtName" column="districtName"/>
        <result property="monitorTime" column="monitorTime"/>
        <result property="rain" column="rain"/>
        <result property="monitoringStation" column="monitoringStation"/>
        <result property="monitoringAddress" column="monitoringAddress"/>
    </resultMap>

    <!--获取雨量信息总记录数-->
    <select id="getRainQualityCount" parameterType="map" statementType="CALLABLE">
        {call GETRAINQULITYCOUNT(#{map.count,mode=OUT,jdbcType=INTEGER,javaType=Integer})}
    </select>

    <!--分页查询雨量信息-->
    <select id="getRainQualityList" parameterType="map" statementType="CALLABLE">
        {call GETRAINQULITY(#{map.startIndex},#{map.maxIndex},#{map.rainQuality,mode=OUT,jdbcType=CURSOR,javaType=java.sql.ResultSet,resultMap=rainQualityMap})}
    </select>
</mapper>

1.5 Test Results

2. New data

2.1 Create a stored procedure (using CREATE PROCEDURE)

CREATE OR REPLACE PROCEDURE addRainQuality --定义存储过程有一点像Java中定义方法
(
    districtName IN VARCHAR2, --注意这里不允许定义大小 否则会编译出错
    monitorTime IN DATE,
    rain IN NUMBER,
    monitoringStation IN VARCHAR2,
    monitoringAddress IN VARCHAR2,
    r_result OUT NUMBER, --返回内容
    r_msg OUT VARCHAR2
) AS
BEGIN
    --保证程序的键值性 以及数据的完整性进行适当的数据验证
    IF districtName IS NULL THEN
        --抛出异常
        RAISE_APPLICATION_ERROR(-20001,'districtName IS NULL');
    ELSIF monitorTime IS NULL THEN
        RAISE_APPLICATION_ERROR(-20001,'monitorTime IS NULL');
    ELSIF rain IS NULL THEN
        RAISE_APPLICATION_ERROR(-20001,'rain IS NULL');
    ELSIF monitoringStation IS NULL THEN
        RAISE_APPLICATION_ERROR(-20001,'monitoringStation IS NULL');
    ELSIF monitoringAddress IS NULL THEN
        RAISE_APPLICATION_ERROR(-20001,'monitoringAddress IS NULL');
    ELSE
        INSERT INTO rainQuality
        VALUES(seq_rainQuality.nextval,districtName,monitorTime,
               rain,monitoringStation,monitoringAddress);
        --为返回数据赋值
        r_msg:='SUCCESS';
        r_result:=1;
    END IF;
--异常处理
EXCEPTION
    WHEN OTHERS THEN
        --为返回数据赋值
       r_msg:=SQLCODE||SQLERRM;
       r_result:=0;
END addRainQuality;

2.2 code that implements the business logic layer

/**
     * 添加雨量信息的方法
     *
     * @param rainQuality
     */
    @Override
    public boolean addRainQuality(RainQuality rainQuality) {
        HashMap<String,Object> map=new HashMap<>();

        map.put("rain", rainQuality);

        //调用dao层进行数据持久化保存
        rainQualityMapper.addRainQuality(map);

        if (((int)map.get("result"))==1){
            return true;
        }

        logger.info(map.get("msg"));

        return false;
    }

2.3 DAO interface method declaration

 /**
     * 添加雨量信息的方法
     * @param map
     */
    public void addRainQuality(@Param("map")Map<String,Object> map);

2.4 Mapping SQL statement mapping file

<!--添加雨量信息-->
    <insert id="addRainQuality" parameterType="map" statementType="CALLABLE">
        {call ADDRAINQUALITY(#{map.rain.districtName},#{map.rain.monitorTime},
        #{map.rain.rain},#{map.rain.monitoringStation},#{map.rain.monitoringAddress},
        #{map.result,mode=OUT,jdbcType=INTEGER,javaType=Integer},
        #{map.msg,mode=OUT,jdbcType=VARCHAR,javaType=String})}
    </insert>

2.5 Test Results

3. Delete Data

3.1 Definitions Stored Procedures

--定义删除数据的存储过程
CREATE OR REPLACE PROCEDURE delRainQulity
(
    id NUMBER,
    r_result OUT NUMBER, --返回内容
    r_msg OUT VARCHAR2
) AS
BEGIN
    DELETE FROM rainQuality
       WHERE rainQuality.id=id;
    r_result:=1;
    r_msg:='SUCCESS';
EXCEPTION
    WHEN OTHERS THEN
       r_result:=0;
       r_msg:=SQLCODE||SQLERRM;
END;

3.2 code that implements the business logic layer

    /**
     * 删除雨量信息的方法
     *
     * @param id
     */
    @Override
    public boolean delRainQualityById(Integer id) {
        logger.info("=================exec delRainQualityById()====================");
        logger.info("id===>"+id);

        HashMap<String,Object> map=new HashMap<>();

        map.put("id", id);

        rainQualityMapper.delRainQualityById(map);

        if (((int)map.get("result"))==1){
            return true;
        }

        logger.info(map.get("msg"));

        return false;
    }

3.3 DAO interface methods defined

    /**
     * 删除雨量信息的方法
     * @param map
     */
    public void delRainQualityById(@Param("map")Map<String,Object> map);

3.4 SQL mapping information Configuration

    <!--删除雨量信息-->
    <delete id="delRainQualityById" parameterType="map" statementType="CALLABLE">
        {call DELRAINQULITY(#{map.id},
        #{map.result,mode=OUT,jdbcType=INTEGER,javaType=Integer},
        #{map.msg,mode=OUT,jdbcType=VARCHAR,javaType=String})}
    </delete>

3.5 Test Results