Java CsvMapper.schemaFor方法代码示例

import com.fasterxml.jackson.dataformat.csv.CsvMapper; //导入方法依赖的package包/类
@Setup(Level.Iteration)
public void setUp() {
    dsl = CsvWriter.from(SmallBenchmarkObject.class).skipHeaders();
    sbo = new SmallBenchmarkObject();
    sbo.setId(2);
    sbo.setEmail("[email protected]");
    sbo.setName("name");
    sbo.setYearStarted(222);

    CsvMapper mapper = new CsvMapper();
    CsvSchema schema = mapper.schemaFor(SmallBenchmarkObject.class);


    myObjectWriter = mapper.writer(schema);

    settings = new CsvWriterSettings();
    settings.setHeaders("id", "year_started", "name", "email");
    settings.setRowWriterProcessor(new BeanWriterProcessor<SmallBenchmarkObject>(SmallBenchmarkObject.class));

}
 

import com.fasterxml.jackson.dataformat.csv.CsvMapper; //导入方法依赖的package包/类
private List<BinaryLabeledContributionInterchange> fromCsv(String inputFileName) throws IOException{
	List<BinaryLabeledContributionInterchange> itemList = new ArrayList<>();
	try(InputStream in = new FileInputStream(inputFileName);) {
		CsvMapper mapper = new CsvMapper();
		CsvSchema schema = mapper.schemaFor(BinaryLabeledContributionInterchange.class);
		MappingIterator<BinaryLabeledContributionInterchange> it = mapper.readerFor(BinaryLabeledContributionInterchange.class).with(schema).readValues(in);
		while (it.hasNextValue()) {
			itemList.add(it.next());
		}
	}			
	return itemList;
}
 

import com.fasterxml.jackson.dataformat.csv.CsvMapper; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
    CostDetail costDetail = new CostDetail();
    costDetail.setAmount(BigDecimal.valueOf(12.55D));
    costDetail.setApplyId(11L);
    costDetail.setCostCenterId(66L);
    costDetail.setCreatedTime(new Date());
    costDetail.setStatus(1L);
    costDetail.setTypeId(77L);
    costDetail.setTypeName("v");
    costDetail.setUserId(88L);
    CsvMapper csvMapper = new CsvMapper();
    CsvSchema csvSchema = csvMapper.schemaFor(CostDetail.class);
    String writeValueAsString = csvMapper.writer(csvSchema).writeValueAsString(costDetail);
    System.out.println(writeValueAsString);// 12.55,11,66,1456645956239,1,77,v,88

    CostDetail readValue = csvMapper.readerFor(CostDetail.class).with(csvSchema).readValue(writeValueAsString);
    System.out.println(readValue);// {"applyId":11,"typeId":77,"typeName":"v","status":1,"amount":12.55,"createdTime":"Feb 28, 2016 3:52:36 PM","userId":88,"costCenterId":66}

    Test test = new Test();

    test.setName("doctor");
    Map<String, String> map = new HashMap<>();
    map.put("age", "16");
    map.put("ke", "vv");

    test.setMap(map);
    CsvSchema testSh = csvMapper.schemaFor(Test.class);
    String writeValueAsString2 = csvMapper.writer(testSh).writeValueAsString(test);
    System.out.println(writeValueAsString2);
    // Exception in thread "main" com.fasterxml.jackson.databind.JsonMappingException: CSV generator does not support Object values for properties (through reference chain: com.doctor.jackson.Test["map"])

}
 

import com.fasterxml.jackson.dataformat.csv.CsvMapper; //导入方法依赖的package包/类
public static CsvSchema csvSchema() {
    CsvMapper csvMapper = new CsvMapper();
    csvMapper.disable(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY);
    return csvMapper.schemaFor(Entry.class);
}
 

import com.fasterxml.jackson.dataformat.csv.CsvMapper; //导入方法依赖的package包/类
/**
 * Creates a Jackson CSV schema based on a mapper and the current object
 * class.
 * 
 * @param csvMapper
 *            The source CSV mapper.
 * @return A Jackson CSV schema
 */
protected CsvSchema createCsvSchema(CsvMapper csvMapper) {
    return csvMapper.schemaFor(getObjectClass());
}