Package utils

Class JsonUtils

java.lang.Object

utils.JsonUtils

public class JsonUtils
extends Object

Utility class for JSON operations using Jackson ObjectMapper. Provides methods for converting between JSON strings, input streams, and Java objects.

Constructor Summary

Constructors

Constructor	Description
JsonUtils()

Method Summary

Modifier and Type	Method	Description
static <T> T	fromJson(String json, Class<T> clazz)	Converts a JSON string to an object of the specified class.
static <T> T	fromJson(String filename, Class<T> clazz, boolean isFile)	Reads and converts a JSON file from the classpath to an object of the specified class.
static Map<String,Object>	jsonFileToMap(String filename)	Converts a JSON file from the classpath to a Map.
static Map<String,Object>	jsonToMap(String json)	Converts a JSON string to a Map.
static String	mapToJson(Map<String,Object> map)	Converts a Map to a JSON string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JsonUtils

public JsonUtils()

Method Details

jsonToMap

public static Map<String,Object> jsonToMap(String json)

Converts a JSON string to a Map.

Parameters:

json - the JSON string to convert

Returns:

a Map representation of the JSON, or an empty map if conversion fails

jsonFileToMap

public static Map<String,Object> jsonFileToMap(String filename)

Converts a JSON file from the classpath to a Map.

Parameters:

filename - the name of the JSON file in the classpath

Returns:

a Map representation of the JSON, or an empty map if conversion fails

mapToJson

public static String mapToJson(Map<String,Object> map)

Converts a Map to a JSON string.

Parameters:

map - the Map

Returns:

a JSON String representation of the Map, or an empty string if conversion fails

fromJson

public static <T> T fromJson(String json,
 Class<T> clazz)

Converts a JSON string to an object of the specified class.

Type Parameters:

T - the type of object to convert to

Parameters:

json - the JSON string to convert

clazz - the class of the target object

Returns:

an instance of the target class, or null if conversion fails

fromJson

public static <T> T fromJson(String filename,
 Class<T> clazz,
 boolean isFile)

Reads and converts a JSON file from the classpath to an object of the specified class.

Type Parameters:

T - the type of object to convert to

Parameters:

filename - the name of the JSON file in the classpath

clazz - the class of the target object

isFile - whether the input is a file (unused parameter)

Returns:

an instance of the target class, or null if the file is not found or conversion fails