当拿到的集合数量很大,需要分组
<!--Lists.partition要用的依赖--> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>21.0</version> </dependency>
package com.java.test.collectdemo; import com.google.common.collect.Lists; import lombok.extern.slf4j.Slf4j; import org.junit.Test; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; /** * @Description: * @Author: Yourheart * @Create: 2022/11/10 17:50 */ @Slf4j public class CollectDemo { @Test public void test(){ List<String> listStr=new ArrayList<>(); for (int i=0;i<10;i++){ Date date = new Date(); SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); String format = simpleDateFormat.format(date); listStr.add(format+" "+i); } List<List<String>> lists = Lists.partition(listStr, 4); lists.forEach(a->{ log.info(a.toString()); }); } }
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.java</groupId> <artifactId>test-study</artifactId> <version>1.0-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.1.RELEASE</version> <relativePath/> </parent> <dependencies> <!--tomcat容器--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--lombok依赖--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.16</version> </dependency> <!--引入junit单元测试依赖--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--判断空的用法 --> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <!-- https://mvnrepository.com/artifact/com.oracle.database.jdbc/ojdbc8 --> <dependency> <groupId>com.oracle.database.jdbc</groupId> <artifactId>ojdbc8</artifactId> <version>12.2.0.1</version> </dependency> <!--springboot整合mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.2</version> </dependency> <!--添加fastjson依赖--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.70</version> </dependency> <!-- 热部署模块 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> <!-- 这个需要为 true 热部署才有效 --> </dependency> <!--ThreadFactoryBuilder的依赖包,多线程使用--> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>30.1-jre</version> </dependency> <!-- <dependency>--> <!-- <groupId>com.google.code.google-collections</groupId>--> <!-- <artifactId>google-collect</artifactId>--> <!-- <version>snapshot-20080530</version>--> <!-- </dependency>--> <!--Lists.partition要用的依赖--> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>21.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> <finalName>study</finalName> </build> </project>
标签:google,spring,boot,切批,如何,import,集合,org,com From: https://www.cnblogs.com/q202105271618/p/16877954.html