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简介

项目搭建

参考博客【场景实战】Spring Boot + Spring Batch 实现批处理任务，保姆级教程

步骤

1.建表
建表sql

CREATE TABLE `student` (`id` int NOT NULL AUTO_INCREMENT,`name` varchar(100) NOT NULL COMMENT '姓名',`class_name` varchar(20) DEFAULT NULL COMMENT '班级名称',`china_score` varchar(4) DEFAULT NULL COMMENT '语文成绩',`math_score` varchar(4) DEFAULT NULL COMMENT '数学成绩',`english_score` varchar(4) DEFAULT NULL COMMENT '英语成绩',`sex` tinyint(1) NOT NULL COMMENT '性别：0-男，1-女',`birthday` date NOT NULL COMMENT '生日',`card_id` varchar(20) NOT NULL COMMENT '身份证号',`phone` varchar(20) NOT NULL COMMENT '手机号',PRIMARY KEY (`id`),UNIQUE KEY `card_id` (`card_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='学生表'

2.pom文件

<?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>org.example</groupId><artifactId>springbatch_study</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><parent><artifactId>spring-boot-starter-parent</artifactId><groupId>org.springframework.boot</groupId><version>2.3.5.RELEASE</version></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>2.3.5.RELEASE</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.33</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.3</version></dependency><!--swagger页面--><dependency><groupId>com.github.xiaoymin</groupId><artifactId>knife4j-spring-boot-starter</artifactId><version>2.0.0</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-batch</artifactId><version>2.3.5.RELEASE</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><version>2.3.5.RELEASE</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.24</version></dependency><dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator</artifactId><version>6.2.2.Final</version></dependency></dependencies></project>

3.启动类

@SpringBootApplication
@EnableSwagger2
public class BatchService {public static void main(String[] args) {SpringApplication.run(BatchService.class,args);}}

4.配置文件

server:port: 8081
spring:application:name: spring-batch-studydatasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/test?serverTimeZone=Asia/Shanghai&characterEncoding=utf-8username: rootpassword: rootbatch:job:enabled: false #需要jobLaucher.run执行initialize-schema: never #第一次没有新建batch内置表时为always，创建内置表后设置为never

注意：spring.batch.initialize-schema第一次运行时写为always，运行后会自动生产batch内置表
5.实体类

package com.test.batch.entity;import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;import java.util.Date;/*** @author 1*/
@Data
public class Student {@TableId(type = IdType.AUTO)private Integer id;/*** '姓名'*/private String name;/*** '班级名称'*/private String className;/*** '语文成绩'*/private String chinaScore;/*** '数学成绩'*/private String mathScore;/*** 英语成绩*/private String englishScore;/*** '性别：0-男，1-女'*/private Integer sex;/*** '生日'*/@JsonFormat(pattern = "yyyy-MM-dd")private Date birthday;/*** '身份证号'*/private String cardId;/*** '手机号'*/private String phone;}

6.batch核心配置类

package com.test.batch.config;import com.test.batch.entity.Student;
import com.test.batch.listen.MyBeanValidator;
import com.test.batch.listen.MyJobListener;
import com.test.batch.listen.MyReaderListener;
import com.test.batch.listen.MyWriteListener;
import com.test.batch.processor.MyProcessor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.launch.support.RunIdIncrementer;
import org.springframework.batch.core.launch.support.SimpleJobLauncher;
import org.springframework.batch.core.repository.JobRepository;
import org.springframework.batch.core.repository.support.JobRepositoryFactoryBean;
import org.springframework.batch.item.ItemProcessor;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.database.BeanPropertyItemSqlParameterSourceProvider;
import org.springframework.batch.item.database.JdbcBatchItemWriter;
import org.springframework.batch.item.file.FlatFileItemReader;
import org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper;
import org.springframework.batch.item.file.mapping.DefaultLineMapper;
import org.springframework.batch.item.file.transform.DelimitedLineTokenizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.core.io.ClassPathResource;
import org.springframework.transaction.PlatformTransactionManager;import javax.sql.DataSource;
import java.text.SimpleDateFormat;
import java.util.Date;/*** @author 1*/
@Configuration
@EnableBatchProcessing
@Slf4j
public class BatchConfig {/*** JobRepository定义及数据库的操作* @param dataSource* @param transactionManager* @return* @throws Exception*/@Beanpublic JobRepository myJobRepository(DataSource dataSource, PlatformTransactionManager transactionManager)throws Exception{JobRepositoryFactoryBean jobRepositoryFactoryBean = new JobRepositoryFactoryBean();jobRepositoryFactoryBean.setDatabaseType("mysql");jobRepositoryFactoryBean.setTransactionManager(transactionManager);jobRepositoryFactoryBean.setDataSource(dataSource);return jobRepositoryFactoryBean.getObject();}/*** JobLauncher:job的启动器，绑定相关的Repository* @param dataSource* @param transactionManager* @return* @throws Exception*/@Beanpublic SimpleJobLauncher myJobLauncher(DataSource dataSource,PlatformTransactionManager transactionManager)throws Exception{SimpleJobLauncher jobLauncher = new SimpleJobLauncher();jobLauncher.setJobRepository(myJobRepository(dataSource,transactionManager));return jobLauncher;}/*** 定义job* @param jobBuilderFactory* @param myStep* @return*/@Beanpublic Job myJob(JobBuilderFactory jobBuilderFactory, Step myStep){return jobBuilderFactory.get("myJob").incrementer(new RunIdIncrementer()).flow(myStep).end().listener(myJobListener()).build();}/*** 注册job监听器* @return*/@Beanpublic MyJobListener myJobListener(){return new MyJobListener();}/*** 定义itemReader，读取文件数据+entity实体映射* @return*/@Beanpublic ItemReader<Student> reader(){FlatFileItemReader<Student> reader = new FlatFileItemReader<>();//设置文件路径reader.setResource(new ClassPathResource("static/student.csv"));reader.setLineMapper(new DefaultLineMapper<Student>(){{setLineTokenizer(new DelimitedLineTokenizer(){{setNames(new String[]{"name","className","chinaScore","mathScore","englishScore","sex","birthday","cardIdd","phone"});}});setFieldSetMapper(new BeanWrapperFieldSetMapper<Student>(){{setTargetType(Student.class);//设置日期转换setConversionService(createConversionService());}});}});return reader;}public ConversionService createConversionService() {DefaultConversionService conversionService = new DefaultConversionService();DefaultConversionService.addDefaultConverters(conversionService);conversionService.addConverter(new Converter<String, Date>() {@Overridepublic Date convert(String text) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");Date date = new Date();try {date = sdf.parse(text);}catch (Exception e){log.error("日期转换异常 ：{}",e);}return date;}});return conversionService;}/*** 注册ItemProcessor，处理数据* @return*/@Beanpublic ItemProcessor<Student,Student> processor(){MyProcessor myProcessor = new MyProcessor();myProcessor.setValidator(myBeanValidator());return myProcessor;}@Beanpublic MyBeanValidator myBeanValidator(){return new MyBeanValidator<Student>();}/*** 定义ItemWriter，指定DataSource,设置批量插入sql语句，写入数据库* @param dataSource* @return*/@Beanpublic ItemWriter<Student> writer(DataSource dataSource){JdbcBatchItemWriter<Student> writer = new JdbcBatchItemWriter<>();writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<>());String sql = "insert into student (name,class_name,china_score,math_score,english_score,sex,birthday,card_id,phone) " +"values (:name,:className,:chinaScore,:mathScore,:englishScore,:sex,:birthday,:cardId,:phone)";writer.setSql(sql);writer.setDataSource(dataSource);return writer;}@Beanpublic Step myStep(StepBuilderFactory factory,ItemReader<Student> reader,ItemWriter<Student> writer,ItemProcessor<Student,Student> processor){return factory.get("myStep").<Student,Student>chunk(5000).reader(reader).faultTolerant().retryLimit(3).retry(Exception.class).skip(Exception.class).skipLimit(2).listener(new MyReaderListener()).processor(processor).writer(writer).faultTolerant().skip(Exception.class).skipLimit(2).listener(new MyWriteListener()).build();}
}

7.自定义处理器

package com.test.batch.processor;import com.test.batch.entity.Student;
import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.item.validator.ValidatingItemProcessor;
import org.springframework.batch.item.validator.ValidationException;/*** @author 1*/
@Slf4j
public class MyProcessor extends ValidatingItemProcessor<Student> {private Integer GOOD = 90;private Integer  BAD = 60;@Overridepublic Student process(Student item) throws ValidationException {/*** 需要执行super.process(item)才会调用自定义校验器*/super.process(item);String chinaScore = item.getChinaScore();String mathScore = item.getMathScore();String englishScore = item.getEnglishScore();String name = item.getName();String phone = item.getPhone();if (GOOD <= Double.parseDouble(chinaScore) && GOOD <= Double.parseDouble(mathScore) && GOOD <= Double.parseDouble(englishScore)){log.info("{}同学三科成绩均为90以上，应该给予奖励", name);}if (BAD > Double.parseDouble(chinaScore) && BAD > Double.parseDouble(mathScore) && BAD > Double.parseDouble(englishScore)){log.info("{}同学三科成绩均不及格，建议通知家长，电话：{}", name,phone);}return item;}
}

8.job监听器

package com.test.batch.listen;import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobExecutionListener;/*** @author 1*/
@Slf4j
public class MyJobListener implements JobExecutionListener {@Overridepublic void beforeJob(JobExecution jobExecution) {log.info("job开始，id:{}",jobExecution.getJobId());}@Overridepublic void afterJob(JobExecution jobExecution) {log.info("id:{}",jobExecution.getJobId());}
}

9.读组件监听器

package com.test.batch.listen;import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.core.ItemReadListener;import static java.lang.String.format;/*** @author 1*/
@Slf4j
public class MyReaderListener implements ItemReadListener {@Overridepublic void beforeRead() {}@Overridepublic void afterRead(Object o) {}@Overridepublic void onReadError(Exception e) {log.error("读取数据失败：{}",e);log.info("item error:"+format("%s%n", e.getMessage()));}
}

10.写组件监听器

package com.test.batch.listen;import com.test.batch.entity.Student;
import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.core.ItemWriteListener;import java.util.List;import static java.lang.String.format;/*** @author 1*/
@Slf4j
public class MyWriteListener implements ItemWriteListener<Student> {@Overridepublic void beforeWrite(List<? extends Student> list) {}@Overridepublic void afterWrite(List<? extends Student> list) {}@Overridepublic void onWriteError(Exception e, List<? extends Student> list) {try {log.info(format("%s%n", e.getMessage()));for (Student message : list) {log.info(format("Failed writing Students : %s", message.toString()));}} catch (Exception ex) {log.error("format error :{}",ex);}}
}

11.字段校验

package com.test.batch.listen;import org.springframework.batch.item.validator.ValidationException;
import org.springframework.batch.item.validator.Validator;
import org.springframework.beans.factory.InitializingBean;import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.ValidatorFactory;
import java.util.Set;/*** @author 1*/
public class MyBeanValidator<T> implements Validator<T>, InitializingBean {private javax.validation.Validator validator;@Overridepublic void validate(T t) throws ValidationException {/*** 使用Validator的validate方法校验数据*/Set<ConstraintViolation<T>> constraintViolations =validator.validate(t);if (constraintViolations.size() > 0) {StringBuilder message = new StringBuilder();for (ConstraintViolation<T> constraintViolation : constraintViolations) {message.append(constraintViolation.getMessage() + "\n");}throw new ValidationException(message.toString());}}@Overridepublic void afterPropertiesSet() throws Exception {ValidatorFactory validatorFactory =Validation.buildDefaultValidatorFactory();validator = validatorFactory.usingContext().getValidator();}
}

12.接口

package com.test.batch.controller;import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.launch.support.SimpleJobLauncher;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.Date;/*** @author 1*/
@RestController
@Slf4j
public class TestController {@AutowiredSimpleJobLauncher launcher;@Autowiredprivate Job job;@GetMapping("testJob")public ResponseEntity testJob(){try {//job添加参数，确保每个job都唯一JobParameters jobParameters = new JobParametersBuilder().addDate("date",new Date()).toJobParameters();launcher.run(job,jobParameters);}catch (Exception e){log.error("job error:{}",e);return ResponseEntity.ok(e.getMessage());}return ResponseEntity.ok("操作成功！！！");}
}

13.数据

14.运行后浏览器输入
http://localhost:8081/doc.html
或页面输入localhost:8081/testJob,文件内容成功写入数据库