java -How to insert excel data to db using batch process? - spring

Question

I am trying to insert excel data to db using batch process using spring. It appears the file can not be parsed correctly as I get the following error :
org.springframework.batch.item.file.FlatFileParseException: Parsing error at line: 2 in resource=[class path resource [BulkData.xlsx]], input=[��ӵL��b.j"�"%5�].
Here is my batch configuration file for spring
#Configuration
#EnableBatchProcessing
public class BatchConfig {
#Autowired
private DataSource dataSource;
#Autowired
private JobBuilderFactory jobBuilderFactory;
#Autowired
private StepBuilderFactory stepBuilderFactory;
#Bean
public FlatFileItemReader<User> reader() {
FlatFileItemReader<User> reader = new FlatFileItemReader<>();
reader.setResource(new ClassPathResource("BulkData.xlsx"));
reader.setLineMapper(getLineMaper());
reader.setLinesToSkip(1);
return reader;
}
private LineMapper<User> getLineMaper() {
DefaultLineMapper<User> lineMapper = new DefaultLineMapper<>();
DelimitedLineTokenizer lineTokenizer = new DelimitedLineTokenizer() lineTokenizer.setNames(new String[]{"firstName", "lastName","email"});
lineTokenizer.setIncludedFields(new int[]{0, 1, 2});
BeanWrapperFieldSetMapper<User> fieldSetMapper = new
BeanWrapperFieldSetMapper<>();
fieldSetMapper.setTargetType(User.class);
lineMapper.setLineTokenizer(lineTokenizer);
lineMapper.setFieldSetMapper(fieldSetMapper);
return lineMapper;
}
#Bean
public UserItemProcesser processer() {
return new UserItemProcesser();
}
public JdbcBatchItemWriter<User> writer() {
JdbcBatchItemWriter<User> writer = new
JdbcBatchItemWriter<>();
writer.setItemSqlParameterSourceProvider(new
BeanPropertyItemSqlParameterSourceProvider<User>());
writer.setSql("insert into user(firstName,lastName,email)
values(:firstName,:lastName,:email)");
writer.setDataSource(this.dataSource);
return writer;
}
#Bean
public Job importUserJob() {
return this.jobBuilderFactory.get("USER-IMPORT-JOB")
.incrementer(new RunIdIncrementer())
.flow(step1())
.end()
.build();
}
#Bean
public Step step1() {
return this.stepBuilderFactory.get("step1")
.<User, User>chunk(10)
.reader(reader())
.processor(processer())
.writer(writer())
.build();
}
}
Model
the model class for the data that has to be parsed from the excel document.
package com.example.exceltodb.model;
public class User {
private String firstName;
private String lastName;
private String email;
// regular java beans constructors, getters and setters
}
is there a specific format xslx files have to have to be parsed correctly by the spring parser, or have I done something wrong with the parsing. Considering the error, it might be some kind of unwanted characters in the file.

Answer 1

The FlatFileItemReader is designed to read flat files, not Microsoft Excel files. You can use the reader from spring-batch-excel extension to read Excel files.