使用Java-Stream将字符串转换为Map，并在结果Map中复制值

String str = "key1=value1,key2=value2,key3=value3";
String[] keyValuePairs = str.split(",");

Map<String, String> resultMap = Arrays.stream(keyValuePairs)
    .map(kv -> kv.split("="))
    .collect(Collectors.toMap(kv -> kv[0], kv -> kv[1]));

Map<String, String> copiedMap = new HashMap<>();
resultMap.forEach((k, v) -> copiedMap.put(k, v));

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;

public class StringToMapExample {
    public static void main(String[] args) {
        String str = "key1=value1,key2=value2,key3=value3";
        String[] keyValuePairs = str.split(",");

        Map<String, String> resultMap = Arrays.stream(keyValuePairs)
            .map(kv -> kv.split("="))
            .collect(Collectors.toMap(kv -> kv[0], kv -> kv[1]));

        Map<String, String> copiedMap = new HashMap<>();
        resultMap.forEach((k, v) -> copiedMap.put(k, v));

        System.out.println(copiedMap);
    }
}

{key1=value1, key2=value2, key3=value3}