如何使用Java漂亮地打印现有的JSON数据？

int spacesToIndentEachLevel = 2;
new JSONObject(jsonString).toString(spacesToIndentEachLevel);

org.json.JSONObject

Gson gson = new GsonBuilder().setPrettyPrinting().create();
String json = gson.toJson(my_bean);

{
  \"name\": \"mkyong\",
  \"age\": 35,
  \"position\": \"Founder\",
  \"salary\": 10000,
  \"skills\": [
    \"java\",
    \"python\",
    \"shell\"
  ]
}

String niceFormattedJson = JsonWriter.formatJson(jsonString)

System.out.println(JsonWriter.formatJson(jsonString.toString()));

com.fasterxml.jackson.databind.ObjectMapper mapper = new ObjectMapper();

mapper.configure(SerializationFeature.INDENT_OUTPUT, true);

mapper.writeValueAsString(<yourObject>);

String json_String_to_print = ...
Gson gson = new GsonBuilder().setPrettyPrinting().create();
JsonParser jp = new JsonParser();
return gson.toJson(jp.parse(json_String_to_print));

<dependency>
    <groupId>com.cedarsoftware</groupId>
    <artifactId>json-io</artifactId>
    <version>4.5.0</version>
</dependency>

import com.cedarsoftware.util.io.JsonWriter;
//...
String jsonString = \"json_string_plain_text\";
System.out.println(JsonWriter.formatJson(jsonString));

U.formatJson(json)

U.formatXml(xml)