【实战】Kafka Producer实战——小程序调查问卷

迈不过友情╰ 2022-12-16 13:21 128阅读 0赞

### 文章目录 ###

*  小程序编译运行-效果预览
 *  准备工作
 *   *  技术
     *  流程图
     *  接口文档
 *  业务开发
 *   *  pom依赖
     *  公共类
     *  工具类
     *  配置类conf
     *  资源类resouce
     *  配置文件yml
     *  写业务
     *  检验
 *  Kafka Producer集成单例
 *  Https
 *   *  解决本地443端口号冲突
     *  解决
     *  待解决
     *  将windows文件压缩tgz
     *  linux文件上传
     *  linux修改项目配置
     *  解决centos7端口443占用
     *  验证https线上运行成功
     *  启动脚本
     *  解决：Linux下-bash: nohup: command not found或者bash: nohup: 未找到命令的问题
     *  解决安全组443
 *  小程序上传
 *   *  开发工具
     *  微信公众平台
     *  配置小程序文件
     *  小程序编译运行-效果预览
     *  centos的kafka环境配置
     *  解决物理内存不足 JVM调优

# 小程序编译运行-效果预览 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 1]

# 准备工作 #

## 技术 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 3]

## 流程图 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 4]

## 接口文档 ##

问题 选项、返回结果、结果汇总报告

# 业务开发 #

## pom依赖 ##

<dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.74</version>
            </dependency>
    
            <dependency>
                <groupId>com.google.guava</groupId>
                <artifactId>guava</artifactId>
                <version>29.0-jre</version>
            </dependency>
            
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.16</version>
                <scope>provided</scope>
            </dependency>

## 公共类 ##

封装统一返回，泛型  
跨域问题

com.bennyrhys.kafka\_study1.wechat.common.BaseResponseVO

package com.bennyrhys.kafka_study1.wechat.common;
    
    import java.util.UUID;
    import lombok.Data;
    
    /** * @author : bennyrhys * @description : 公共返回对象 **/
    @Data
    public class BaseResponseVO<M> { 
    
      private String requestId;
      private M result;
    
      public static<M> BaseResponseVO success(){ 
        BaseResponseVO baseResponseVO = new BaseResponseVO();
        baseResponseVO.setRequestId(genRequestId());
    
        return baseResponseVO;
      }
    
      public static<M> BaseResponseVO success(M result){ 
        BaseResponseVO baseResponseVO = new BaseResponseVO();
        baseResponseVO.setRequestId(genRequestId());
        baseResponseVO.setResult(result);
    
        return baseResponseVO;
      }
    
      private static String genRequestId(){ 
        return UUID.randomUUID().toString();
      }
    
    }

com.bennyrhys.kafka\_study1.wechat.common.CorsFilter

package com.bennyrhys.kafka_study1.wechat.common;
    
    import java.io.IOException;
    import javax.servlet.Filter;
    import javax.servlet.FilterChain;
    import javax.servlet.ServletException;
    import javax.servlet.ServletRequest;
    import javax.servlet.ServletResponse;
    import javax.servlet.annotation.WebFilter;
    import javax.servlet.http.HttpServletResponse;
    import org.springframework.context.annotation.Configuration;
    
    /** * @author : bennyryhs * @description : 跨域问题解决 **/
    @WebFilter(filterName = "CorsFilter")
    @Configuration
    public class CorsFilter implements Filter { 
      @Override
      public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { 
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader("Access-Control-Allow-Origin","*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PATCH, DELETE, PUT");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        chain.doFilter(req, res);
      }
    }

## 工具类 ##

json文件读取（object、array）类型

com.bennyrhys.kafka\_study1.wechat.utils.FileUtils

package com.bennyrhys.kafka_study1.wechat.utils;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONArray;
    import com.alibaba.fastjson.JSONObject;
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileReader;
    import java.io.IOException;
    import java.io.Reader;
    import java.util.Optional;
    import lombok.Cleanup;
    import lombok.extern.slf4j.Slf4j;
    
    /** * @author : bennyrhys * @description : 文件工具类 **/
    @Slf4j
    public class FileUtils { 
    
      public static String readFile(String filePath) throws IOException { 
        @Cleanup
        BufferedReader reader = new BufferedReader(
            new FileReader(new File(filePath))
        );
    
        String lineStr = "";
        StringBuffer stringBuffer = new StringBuffer();
        while ((lineStr = reader.readLine()) != null) { 
          stringBuffer.append(lineStr);
        }
    
        return stringBuffer.toString();
      }
    
    
      public static Optional<JSONObject> readFile2JsonObject(String filePath){ 
        try { 
          String fileContent = readFile(filePath);
          log.info("readFile2Json fileContent: [{}]" , fileContent);
          return Optional.ofNullable(JSON.parseObject(fileContent));
        } catch (IOException e) { 
          e.printStackTrace();
        }
        return Optional.empty();
      }
    
      public static Optional<JSONArray> readFile2JsonArray(String filePath){ 
        try { 
          String fileContent = readFile(filePath);
          log.info("readFile2JsonArray fileContent: [{}]" , fileContent);
          return Optional.ofNullable(JSON.parseArray(fileContent));
        } catch (IOException e) { 
          e.printStackTrace();
        }
        return Optional.empty();
      }
    
    }

## 配置类conf ##

实体类  
com.bennyrhys.kafka\_study1.wechat.conf.WeChatTemplateProperties

package com.bennyrhys.kafka_study1.wechat.conf;
    
    import lombok.Data;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Configuration;
    
    import java.util.List;
    
    @Data
    @Configuration
    @ConfigurationProperties(prefix = "template")
    /** * 存储模板调查结果 */
    public class WeChatTemplateProperties { 
    
        private List<WechatTemplate> templates;
        private int templateResultType; // 结果类型 0-文件 1-数据库 2-es
        private String templateResultFilePath; // 结果文件路径
    
        /** * 存储模板 */
        @Data
        public static class WechatTemplate { 
            private String templateId;
            private String templateFilePath;
            private boolean active;
        }
    }

## 资源类resouce ##

template

[{ 
      "questionId": "1",
      "question": "今天几号",
      "answer": "",
      "options": [
        { "label": "1号", "value": "A"},
        { "label": "2号", "value": "B"},
        { "label": "3号", "value": "C"},
        { "label": "4号", "value": "D"}
      ]},
      { 
        "questionId": "2",
        "question": "你喜爱的颜色",
        "answer": "",
        "options": [
          { "label": "红色", "value": "A"},
          { "label": "黄色", "value": "B"},
          { "label": "绿色", "value": "C"},
          { "label": "紫色", "value": "D"}
        ]}
    ]

kafka\_study1/src/main/resources/templates/templateResult.json

{ 
      "templateId": "001",
      "totalNumber": "102",
      "statistics": [
        { 
          "questionId": "1",
          "question": "今天几号",
          "answers": [
            { "label": "A", "value": 10},
            { "label": "B", "value": 50},
            { "label": "C", "value": 12},
            { "label": "D", "value": 17}
          ]
        },
        { 
          "questionId": "2",
          "question": "你喜爱的颜色",
          "answers": [
            { "label": "A", "value": 12},
            { "label": "B", "value": 52},
            { "label": "C", "value": 17},
            { "label": "D", "value": 17}
          ]
        }
      ]
    }

## 配置文件yml ##

application.yml

server:
      port: 8080
    
    template:
      templates:
        - { "templateId":"1", "templateFilePath":"E:/JAVA/kafka_study1/src/main/resources/templates/template.json", "active":true}
        - { "templateId":"2", "templateFilePath":"E:/JAVA/kafka_study1/src/main/resources/templates/template.json", "active":false}
      template-result-type: 0  # 结果类型 0-文件 1-数据库 2-es(注意驼峰命名改横线小写链接)
      template-result-file-path: "E:/JAVA/kafka_study1/src/main/resources/templates/templateResult.json"

## 写业务 ##

[https://github.com/bennyrhys/kafka\_study.git ][https_github.com_bennyrhys_kafka_study.git]

## 检验 ##

查询模板信息  
http://localhost:8080/v1/template  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 5]

查询模板统计结果  
http://localhost:8080/v1/template/result  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 6]  
提交调查问卷结果  
windows通过gitbash模拟linux环境 post  
返回结果  
requestId":“0725ef59-52fb-432c-aef5-4276cc25ae37”,“result”:null\}

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 7]

-- 查询模板信息
    curl -XGET http://localhost:8080/v1/template
    
    
    -- 查询模板统计结果
    curl -XGET http://localhost:8080/v1/template/result
    
    -- 传入调查问卷结果
    curl -XPOST -H "Content-Type:application/json; charset=UTF-8" http://localhost:8080/v1/template/report -d \
    '{ templateId:"001", result:[ {"questionId":"1","question":"今天几号","answer":"A"}, {"questionId":"2","question":"你喜爱的颜色","answer":"B"} ] }'
    
    
    netstat -ano | findstr 443

# Kafka Producer集成单例 #

kafka的Producer是线程安全的，实际生成环境不建议Producer创建多回。  
如果多线程情况下创建多个producer，性能消耗比想象中消耗要大。甚至不如单线程。  
因为producer的send是 往中间队列中存入数据， 后台线程将数据批量的刷给服务器。创建多个producer使频繁的上下文争抢，上下文切换

而每次进入controller->service就相当于创建一个新实例，为了防止producer被创建多次，应该单独把producer封装到common或utils或conf

# Https #

SSL的AC证书认证  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 8]域名备案20个工作日左右  
同一个证书只能绑定一个域名  
绑定域名不包含二三级子域名

**证书下载**  
因为springBoot内置的tomcat  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 9]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 10]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 12]  
下载出 的证书及密码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 13]

**启动协议变为https**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 14]

server:
      port: 443
      ssl:
        key-store: 3974629_www.996cloud.work.pfx # 证书的文件名
        key-store-password: O4d8Fl8t

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 15]  
准备上传服务器的文件  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 16]

## 解决本地443端口号冲突 ##

windows查看端口号  
`C:\Users\rxguo>netstat -ano |findstr "443"`

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 17]

赫然发现443被一个pid为7296的进程占用着.  
查看该pid对应的程序:  
`tasklist |findstr "进程id号"`  
![在这里插入图片描述][20201022100118929.png_pic_center]  
于是我尝试杀掉该进程:被拒绝  
`taskkill /f /t /im "进程id或者进程名称"`

打开VM虚拟机,点击菜单中的“编辑-首选项”,把共享虚拟机给关闭;  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 18]

## 解决 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 19]https://localhost/v1/template  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 20]

## 待解决 ##

查logbak.xml  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 21]

## 将windows文件压缩tgz ##

`tar -zcvf 文件.tgz 文件名`  
![在这里插入图片描述][20201021172819435.png_pic_center]

## linux文件上传 ##

`yum install -y lrzsz`

## linux修改项目配置 ##

地址和ip地址  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 22]

root@iZ2ze21075lo3b5h7k3wozZ wechat]# ll
    total 29468
    -rw-r--r-- 1 root root 30175119 Oct 21 17:29 wechat-template.tgz
    [root@iZ2ze21075lo3b5h7k3wozZ wechat]# tar -zxf wechat-template.tgz 
    [root@iZ2ze21075lo3b5h7k3wozZ wechat]# ll
    total 29472
    drwxr-xr-x 3 1173931 1049089     4096 Oct 21 17:27 wechat-template
    -rw-r--r-- 1 root    root    30175119 Oct 21 17:29 wechat-template.tgz
    [root@iZ2ze21075lo3b5h7k3wozZ wechat]# cd wechat-template
    [root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# ll
    total 32076
    -rw-r--r-- 1 1173931 1049089     4554 Oct 21 16:57 3974629_www.996cloud.work.pfx
    -rw-r--r-- 1 1173931 1049089      819 Oct 21 17:07 application.yml
    -rw-r--r-- 1 1173931 1049089 32825383 Oct 21 17:25 kafka-template.jar
    drwxr-xr-x 2 1173931 1049089     4096 Oct 21 17:21 templates
    [root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# vi application.yml

## 解决centos7端口443占用 ##

停掉之前的项目

cd /usr/local/java/tomcat/apache-tomcat-8.5.40/bin/
    netstat -nap | grep 443

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 23]

## 验证https线上运行成功 ##

https://www.996cloud.work/v1/template  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 24]  
注意因为线上环境缺少kafka所以会报warn  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 25]

## 启动脚本 ##

[root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# vi start.sh
    
    # !/bin/bash
    nohub java -jar wechat-template.jar &
    
    // 赋予脚本执行权限
    -rw-r--r-- 1 root    root          51 Oct 22 10:36 start.sh
    [root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# chmod u+x start.sh 
    // 有了权限文件名变为绿色
    [root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# ll
    total 32080
    -rw-r--r-- 1 1173931 1049089     4554 Oct 21 16:57 3974629_www.996cloud.work.pfx
    -rw-r--r-- 1 1173931 1049089      786 Oct 22 10:21 application.yml
    -rwxr--r-- 1 root    root          51 Oct 22 10:36 start.sh

## 解决：Linux下-bash: nohup: command not found或者bash: nohup: 未找到命令的问题 ##

不要错写成nohub是nohup  
[https://blog.csdn.net/qq\_40241957/article/details/98584207][https_blog.csdn.net_qq_40241957_article_details_98584207]

## 解决安全组443 ##

1 安全组的端口添加绿卡443  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 26]  
![在这里插入图片描述][20201022104905832.png_pic_center]  
2 centos的防火墙关闭

[root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# systemctl status fillwalld
    Unit fillwalld.service could not be found.
    [root@iZ2ze21075lo3b5h7k3wozZ wechat-template]# systemctl status firewalld
    ● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
       Active: inactive (dead)
         Docs: man:firewalld(1)

# 小程序上传 #

## 开发工具 ##

小程序  
[https://developers.weixin.qq.com/miniprogram/dev/devtools/stable.html][https_developers.weixin.qq.com_miniprogram_dev_devtools_stable.html]  
nodejs  
[https://nodejs.org/en/][https_nodejs.org_en]

配置node环境变量  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center 27]检验node

C:\Users\rxguo>node -v
    v12.19.0

## 微信公众平台 ##

appid:wx9018260c5501cfb1238

## 配置小程序文件 ##

解压qe文件

删除自动生成的dist文件

关注package.json,其中config.ts在src目录下  
![在这里插入图片描述][20201022113400721.png_pic_center]修改config.ts,修改后端对应地址  
`export const baseUrl: string = 'https://www.996cloud.work'`

git bash右键，命令行编译  
注意：install只会会**产生node\_moudle** 模板文件特别大

// 检验是否有cnpm
    cnpm -v
    // 没有则安装cnpm
    npm install -g cnpm --registry=https://registry.npm.taobao.org
    
    cnpm install -g @tarojs/cli@2.0.6
    
    cnpm install
    
    npm run build:weapp

注意如果taro 出现问题  
`taro info` 查看版本信息

**生成dist文件**，就是要发布到微信程序里的内容

## 小程序编译运行-效果预览 ##

## centos的kafka环境配置 ##

见博主的【消息队列】kafka 文章

## 解决物理内存不足 JVM调优 ##

Java HotSpot™ 64-Bit Server VM warning: INFO: os::commit\_memory(0x0000000794500000, 576716800, 0)

**停止当前后台运行的jar**

// 找到java对应的pid
    netstat -anp
    // 杀死进程pid
    kill -9 进程pid

重新修改启动脚本

nohup  java -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m -jar wechat-template.jar &

JAVA\_OPTS="-server -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m"  
java -Xms512m -Xmx512m -XX:+UseG1GC -XX:+PrintGCDetails -jar 项目.jar

命令行查看内存占用的pid  
`top`  
选着性  
`kill -9 pid号`

**mysql的进程**没法直接关闭一直变动  
[https://blog.csdn.net/chinabluexfw/article/details/7170123?utm\_medium=distribute.pc\_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu\_weight&depth\_1-utm\_source=distribute.pc\_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu\_weight][https_blog.csdn.net_chinabluexfw_article_details_7170123_utm_medium_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu_weight_depth_1-utm_source_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu_weight]

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[https_github.com_bennyrhys_kafka_study.git]: https://github.com/bennyrhys/kafka_study.git
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[https_blog.csdn.net_qq_40241957_article_details_98584207]: https://blog.csdn.net/qq_40241957/article/details/98584207
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[https_developers.weixin.qq.com_miniprogram_dev_devtools_stable.html]: https://developers.weixin.qq.com/miniprogram/dev/devtools/stable.html
[https_nodejs.org_en]: https://nodejs.org/en/
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[https_blog.csdn.net_chinabluexfw_article_details_7170123_utm_medium_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu_weight_depth_1-utm_source_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu_weight]: https://blog.csdn.net/chinabluexfw/article/details/7170123?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu_weight&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.edu_weight