项目涉及技能点记录

￡神魔★判官ぃ 2022-02-26 06:46 180阅读 0赞

1.代替for循环

List<MeetSummary> meetSummary = meetManagerDao.selectMeetInfo();

lamdba表达式+stream流  
1）：

//循环添加uuid
                meetSummary.stream().forEach(
                        m -> m.setMeetSmId(UUID.randomUUID().toString())
                );

（2）：

List<MeetInfo> meetInfoList = meetManagerDao.selectAll();
                meetInfoList.stream().forEach(
                        m -> {
                           直接写逻辑判断
                        }
                );

2.代替 if-else  
3.mybatis中插入list

<insert id="insertSummary" parameterType="java.util.List">
    		insert into meet_summary
    		(
    		meet_sm_id,
    		meeting_id,
    		meeting_name,
    		fz_name,
    		meeting_place,
    		start_time,
    		end_time,
    		organize_dept
    		)
    		values
    		<foreach collection="list" item="item" index= "index" separator =",">
    			(
    			#{item.meetSmId},
    			#{item.meetingId},
    			#{item.meetingName},
    			#{item.fzName},
    			#{item.meetingPlace},
    			#{item.startTime},
    			#{item.endTime},
    			#{item.organizeDept}
    			)
    		</foreach>
    	</insert>

4.MySql有关子查询的修改

update meet_info q inner join (select meeting_id,
    		meeting_name,
    		fz_name,
    		meeting_place,
    		start_time,
    		end_time,
    		organize_dept from meet_info where record_flag = '1') t on q.meeting_id =t.meeting_id  set q.record_flag='2';

5.date类型时间比较

int compareTo = date1.compareTo(date2);

compareTo()方法的返回值，date1小于date2返回-1，date1大于date2返回1，相等返回0  
6.example类  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NjI5Mjc3_size_16_color_FFFFFF_t_70]  
7.application.yml基本配置

app:
      instance:
        code: oa-server
        profile: dev
      error:
        prefix: OA
      authority:
        check-oauth: false
        check-url: false
      redis:
        prefix: OA
      file:
        uploadPath: D:/file/upload
    server:
      port: 1998
      tomcat:
        max-threads: 500
    logging:
      config: classpath:logback-config.xml
      file: ${app.instance.code}
      path: ./log
      level:
        root: info
        com.bestvike: debug
        org.springframework.security: warn
    spring:
      application:
        name: ${app.instance.code}-${app.instance.profile}
      http:
        converters:
          preferred-json-mapper: fastjson # json 转换器, 接收数据和请求数据时使用
          preferred-xml-mapper: jackson # xml 转换器, 请求数据时使用
        encoding:
          force: true
      servlet:
        multipart:
          max-file-size: 20MB # 最大文件大小
          max-request-size: 20MB # 最大请求大小
      redis:
    #    host: 172.10.11.111
        host: 127.0.0.1
        port: 6379
        timeout: 10s
        lettuce:
          pool:
            min-idle: 10
            max-idle: 20
            max-active: 100
      data:
        mongodb:
          uri: mongodb://oa:oa@172.10.11.111:27017/oa
    datasources:
      oa:
        jdbc-url: jdbc:mariadb://172.10.11.112:3306/oa
        username: oa
        password: oa
        hikari:
          minimum-idle: 2
          maximum-pool-size: 5
          connection-test-query: select 1
    # ===================================================================
    # 分布式文件系统FDFS配置
    # https://github.com/tobato/FastDFS_Client
    # ===================================================================
    fdfs:
      so-timeout: 1501
      connect-timeout: 601
      thumb-image:             #缩略图生成参数
        width: 150
        height: 150
      tracker-list:            #TrackerList参数,支持多个
        - 172.10.11.111:22122

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NjI5Mjc3_size_16_color_FFFFFF_t_70]: /images/20220226/1373686549b142b18d8aef3cba5ef86d.png