適用於Java的JSON美化庫

Question

我想使用Java格式化包含JSON數據的字符串。有沒有人知道一個開源的庫。

Answer 1

假設你開始與現有的JSON字符串，然後Jackson可以爲你做到這一點：

ObjectMapper objectMapper = new ObjectMapper(); 
objectMapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, true); 

String originalJson = ... 
JsonNode tree = objectMapper .readTree(originalJson); 
String formattedJson = objectMapper.writeValueAsString(tree); 

Answer 2

您可以嘗試JSON-lib目錄下： http://json-lib.sourceforge.net/apidocs/jdk15/net/sf/json/JSONObject.html#toString(int, int)

Answer 3

與傑克遜2.6.1

String beautify(String json) throws IOException { 
    ObjectMapper mapper = new ObjectMapper(); 
    Object obj = mapper.readValue(json, Object.class); 
    return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(obj); 
} 

的pom.xml：

<dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-core</artifactId> 
     <version>2.6.1</version> 
    </dependency> 

    <dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-databind</artifactId> 
     <version>2.6.1</version> 
    </dependency> 

Convert JSON String to Pretty Print JSON output using Jackson

Answer 4

更新由skaffman前面的答案，與傑克遜的新版本（2+，我認爲）。第二行代碼是：

objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true);