一、背景 

读取数据改为从mysql数据库中读取。

Spring Boot 版本为2.4.4 

mysql版本为8.0

二、设计

我们以前是直接读取的txt文件,现在该了直接从mysql读取。

本期改造没有使用任何设计模式,直接水流线实现 了我们的功能。

数据库数据:

mybatis 操作 mongodb_数据库

 根据用户请求的uri,作为条件,去表里查询数据。当同一个uri下,有多条数据时,就要去对比请求参数的命中的权重,取一个权重最大的返回数据。

举例:

在数据中,有两条uri为/baidu/search 的数据。

uri

response_content

params

/baidu/search

{"type":"类型一","key11":"${random:id:6}","key2":"${random:str:10}","count":3,"person":[{"id":${hook:id}},"name":"张三"},{"id":2,"name":"李四"}],"object":{"id":1,"msg":"对象里的对象"}}

{"name=book":1,"classification=Language":5}

/baidu/search

{"type":"类型二","key11":"${random:id:6}","key2":"${random:str:10}","count":3,"person":[{"id":${hook:id}},"name":"张三"},{"id":2,"name":"李四"}],"object":{"id":1,"msg":"对象里的对象"}}

{"name=book":1,"classification=Math":4}

mybatis 操作 mongodb_java_02

数据1的params 为:{"name=book":1,"classification=Language":5}

数据2的params 为:{"name=book":1,"classification=Math":4}

用户的请求为:

http://127.0.0.1:8081/baidu/search?name=book&classification=Math

数据1,命中"name=book",权重为1

数据2,命中"name=book",权重为1,命中"classification=Math",权重为4,数据2的总权重为1+4=5

5>1,所以我们取数据2的返回值进行返回。

对数据2的返回数据,再次进行加工,比如替换随机字符串等等。

三、数据初始化

1、创建为名mockserver的库

2、创建表response

3、插入几条用于演示的数据

/*
 Navicat Premium Data Transfer

 Source Server         : 本地- mysql
 Source Server Type    : MySQL
 Source Server Version : 50710
 Source Host           : localhost:3306
 Source Schema         : mockserver

 Target Server Type    : MySQL
 Target Server Version : 50710
 File Encoding         : 65001

 Date: 26/07/2023 16:41:48
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for response
-- ----------------------------
DROP TABLE IF EXISTS `response`;
CREATE TABLE `response` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `uri` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `response_content` text COLLATE utf8mb4_unicode_ci,
  `params` text COLLATE utf8mb4_unicode_ci,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ----------------------------
-- Records of response
-- ----------------------------
BEGIN;
INSERT INTO `response` (`id`, `uri`, `response_content`, `params`) VALUES (1, '/baidu/search', '{\"type\":\"sougou_1\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\",\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}', '{\"name=book\":1,\"classification=Language\":5}');
INSERT INTO `response` (`id`, `uri`, `response_content`, `params`) VALUES (2, '/baidu/search', '{\"type\":\"sougou_2\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\",\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}', '{\"name=book\":1,\"classification=Math\":4}');
INSERT INTO `response` (`id`, `uri`, `response_content`, `params`) VALUES (3, '/sougou/search', '{\"type\":\"sougou_3\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\",\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}', '{\"name=sougou\":2,\"classification=Math\":4}');
INSERT INTO `response` (`id`, `uri`, `response_content`, `params`) VALUES (4, '/sougou/search', '{\"type\":\"sougou_4\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\",\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}', '{\"name=sougou\":2,\"classification=Language\":5}');
INSERT INTO `response` (`id`, `uri`, `response_content`, `params`) VALUES (5, '/taobao/search', '{\"type\":\"类型一\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\"},\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}', '{\"name=lisi\":1,\"classification=Math\":4}');
INSERT INTO `response` (`id`, `uri`, `response_content`, `params`) VALUES (7, '/taobao/search', '{\"type\":\"张三\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\"},\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}', '{\"name=zhangsan\":1,\"classification=Math\":4}');
COMMIT;

四、相关接口

4.1 创建mock数据

POST请求

URL:http://127.0.0.1:8081/addResponse

请求体为json格式:

{
    "uri":"/taobao/search",
    "params":"{\"name=zhangsan\":1,\"classification=Math\":4}",
    "response_content":"{\"type\":\"张三\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\"},\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}"
}

注意:

请求体中的双引号,一定要通过反斜杠转义

4.2 mock请求

GET请求 URL:http://127.0.0.1:8081/baidu/search?name=book&classification=Language

返回值:

{
    "type": "sougou_1",
    "key11": "816986",
    "key2": "npUtLZWAnu",
    "count": 3,
    "person": [
        {
            "id": "${hook:id}",
            "name": "张三"
        },
        {
            "id": 2,
            "name": "李四"
        }
    ],
    "object": {
        "id": 1,
        "msg": "对象里的对象"
    }
}

4.3 修改mock数据

POST

URL:http://127.0.0.1:8081/updateResponse

请求体JSON

{
    "id":5,
    "uri":"/taobao/search",
    "params":"{\"name=lisi\":1,\"classification=Math\":4}",
    "response_content":"{\"type\":\"类型一\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\"},\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}"
}

注意:

请求体中的双引号,一定要通过反斜杠转义

4.4 删除mock数据

通过id进行删除

POST

http://127.0.0.1:8081/deleteResponse

请求体json

{
    "id":6
}

4.5 查询mock列表

GET

http://127.0.0.1:8081/allResponse

五、对返回值数据进行加工

{
    "uri":"/taobao/search",
    "params":"{\"name=zhangsan\":1,\"classification=Math\":4}",
    "response_content":"{\"type\":\"张三\",\"key11\":\"${random:id:6}\",\"key2\":\"${random:str:10}\",\"count\":3,\"person\":[{\"id\":\"${hook:id}\"},\"name\":\"张三\"},{\"id\":2,\"name\":\"李四\"}],\"object\":{\"id\":1,\"msg\":\"对象里的对象\"}}"
}

response_conten 就是返回给用户的数据。

${random:id:6} 会生成6位的随机数字

${random:str:10} 会生成10位的随机字符串

六、应用MyBatis

6.1 依赖

  1. 在Spring Boot项目中添加所需的依赖。在你的项目的pom.xml文件中,添加以下依赖关系:
<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
<dependency>

6.2  配置数据库连接

配置数据库连接。在application.propertiesapplication.yml文件中配置你的数据库连接信息,例如:

application.properties:

spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase
spring.datasource.username=dbuser
spring.datasource.password=dbpassword

application.yml:

server:
  port: 8081

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/mockserver?useUnicode=true&characterEncoding=UTF-8
    username: root
    password: 123456
    driver-class-name: com.mysql.cj.jdbc.Driver

创建MyBatis映射器接口和对应的SQL映射文件。在你的包结构中创建一个映射器接口,并为该接口定义需要执行的数据库操作。同时,在resources目录下创建与映射器接口相对应的XML文件,存放SQL语句和查询逻辑。

在Spring Boot主类中添加@MapperScan注解。在你的Spring Boot主类上添加@MapperScan注解,指定包路径以扫描MyBatis映射器接口。

6.3 实例层entity

存放的是我们需要的实例。

MockOnlyResponse  对应数据库中的response表中的数据 

mybatis 操作 mongodb_mybatis 操作 mongodb_03

我们还在这个类中,提供了读取数据的方法。

package com.example.mockserver.entity;

import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

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


@Data
@NoArgsConstructor
public class MockOnlyResponse {
    private String response_content;
    private String params;

    public MockOnlyResponse(String response_content,String params) {
        this.response_content = response_content;
        this.params = params;
    }

    public Map<String, Integer> getMapParams() {
        // 将接口拿到的数据库中的请求体,设置为字典
        return getMap(this.params);

    }

    // 将字符串直接转成字典
    public Map<String, Integer> getMap(String jsonString) {
//        String jsonString = "{\"name=book\":1,\"classification=Language\":5}";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            Map<String, Integer> dictionary = objectMapper.readValue(jsonString, Map.class);

            return dictionary;
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;

    }

}

6.4  mybatis的mapper层

接口:

OnlyResponseMapper

package com.example.mockserver.mapper;


import com.example.mockserver.entity.MockOnlyResponse;
import org.springframework.stereotype.Repository;
import java.util.List;

import org.apache.ibatis.annotations.Select;


@Repository
public interface OnlyResponseMapper {
    @Select("select r.response_content,r.params from response r where uri = #{uri}")
    List<MockOnlyResponse> findByUri(String uri);
}

执行sql,通过uri 查询数据

6.5  spring boot service 层

service接口,OnlyResponseService

package com.example.mockserver.service;

import com.example.mockserver.entity.MockOnlyResponse;



import java.util.List;

public interface OnlyResponseService {
    List<MockOnlyResponse> findByUri(String uri);
}

service实现类,ResponseServiceImpl

package com.example.mockserver.service.imp;
import com.example.mockserver.entity.MockOnlyResponse;
import com.example.mockserver.mapper.OnlyResponseMapper;
import com.example.mockserver.service.OnlyResponseService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class ResponseServiceImpl implements OnlyResponseService {

    @Autowired
    private OnlyResponseMapper onlyMapper;

    @Override
    public List<MockOnlyResponse> findByUri(String uri) {
        return onlyMapper.findByUri(uri);
    }

}

我们在spring boot service 实现类中,注入了mybatis 的 mapper接口。

6.6 controller层

ResponseController

package com.example.mockserver.controller;
import com.example.mockserver.entity.MockOnlyResponse;
import com.example.mockserver.service.OnlyResponseService;
import com.example.mockserver.util.ArrayUtil;
import com.example.mockserver.util.ReplaceRandomUtil;
import lombok.extern.slf4j.Slf4j;

import com.example.mockserver.model.MockContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@RestController
@Slf4j
public class ResponseController {
    @Autowired
    private OnlyResponseService onlyResponseService;

    @Autowired
    private HttpServletRequest request;


    @RequestMapping("/**")
    public String doMock() throws IOException {

        log.info("请求的URI---------:"+request.getRequestURI());
        log.info("请求IP---------:"+request.getRemoteAddr());
        log.info("请求的参数---------:"+request.getParameterMap());


        // 将获取的用户数据 ip 参数 URI ,存储到 mockContext 这个类里
        MockContext mockContext = MockContext.builder()
                .requestIp(request.getRemoteAddr()) // 获取ip
                .requestParams(getParams(request.getParameterMap()))
                .requestURI(request.getRequestURI()) // 获取请求的URI
                .build();

        // [name=zhangsan, classification=Language]
        List<String> userParamStringList = mockContext.getParamStringList();
        Integer totalNum = 0;
        String response = "";
        System.out.println(userParamStringList);



        // 开始遍历
        List<MockOnlyResponse> mockOnlyResponseList = onlyResponseService.findByUri(mockContext.getRequestURI());
        System.out.println(mockOnlyResponseList);
        for (MockOnlyResponse mockOnlyResponse : mockOnlyResponseList) {
            Integer num = 0;
            for(String str:userParamStringList){
                // 字典
                Map<String, Integer> mapParams = mockOnlyResponse.getMapParams();
                if (mapParams.containsKey(str)) {
                    num += mapParams.get(str);
                }
            }
            if(num>totalNum){
                totalNum = num;
                response = mockOnlyResponse.getResponse_content();
            }
        }
        // 随机数字/字符串处理
        response = ReplaceRandomUtil.replaceRandomFields(response);
        return response;

    }

    // 获取用户的传参,value是一个数组。这里为了将来处理方便,我们将这数组转成一个字符串。
    // 我们默认,这个数据的长度是1,那我们只需要取出来数组的第一个值就可以了。
    public Map<String,String> getParams(Map<String,String[]> parameterMap){
        Map<String,String> params = parameterMap.entrySet().stream().collect(Collectors.toMap(e -> e.getKey(), e -> ArrayUtil.getFirst(e.getValue())));
        return params;

    }
}


6.7  应用启动层MockServerApplication

package com.example.mockserver;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
@MapperScan(basePackages = "com.example.mockserver.mapper")
public class MockServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(MockServerApplication.class, args);
    }

}

我们需要在项目启动层,增加mapper的扫描。

相对于单纯的mybatis 使用,spring boot 应用mybatis 缺少了mybatis 的总配置文件。

这里填写包名。@MapperScan(basePackages = 

七、对数据处理

数据的处理逻辑,主要都在ResponseController 中,我们暂时没有把它封装出来。

逻辑:

1、获取用户的请求 uri 与请求体

2、将用户的请求体转换为Map

3、根据请求uri,去数据库捞取数据,返回值是一个List

4、对List遍历,取权重最大的返回值的数据

5、对得到的数据进行加工,处理随机字符串等等。

八、演示

mybatis 操作 mongodb_java_04