在JAVA中将两个字符串数组合并为JSON格式

Question

我有两个阵列：

String[] COLUMN_NAMES = { "row_number", "column_name", "column_value_string", "column_value_float", "blockId", "pipelineId" };
String[] Values = { "1", "Output", "Valid", "", "123sde-dfgr", "pipeline-sde34" };

其中，我需要的输出是json格式（将值数组中的空值替换为输出中的null）：

{
    "row_number": 1,
    "column_name": "output",
    "column_value_string": "Valid",
    "column_value_float": null,
    "blockId": "123sde-dfgr",
    "pipelineId": "pipeline-sde34"
}

代码如下：

Map<String,String> result = IntStream.range( 0,COLUMN_NAMES.length ).boxed()
                                .collect( Collectors.toMap( i->COLUMN_NAMES[i], i->Values[i] ) );

Answer 1

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.LinkedHashMap;
import java.util.Map;

public class Test {

    public static void main(String[] args) throws JsonProcessingException {
        String[] COLUMN_NAMES = { "row_number", "column_name", "column_value_string", "column_value_float", "blockId", "pipelineId" };
        String[] Values = { "1", "Output", "Valid", "", "123sde-dfgr", "pipeline-sde34" };
        Map<String, String> map = new LinkedHashMap<>();
        for (int i = 0; i < COLUMN_NAMES.length; i++) {
            map.put(COLUMN_NAMES[i], Values[i]);
        }

        String json = new ObjectMapper().writeValueAsString(map);
        System.out.println(json);
    }
}