JsonUtils工具类

public class JsonUtils {
	public static ObjectMapper objectMapper;
	
	static {
		objectMapper = new ObjectMapper();
	}
	
	/**
	 * 对象转json字符串
	 * @param value 对象
	 * @return    json字符串
	 * @throws Exception
	 */
	public static String objectToJsonStr(Object value) throws Exception {
		return objectMapper.writeValueAsString(value);
	}
	
	/**
	 * json字符串转对象 
	 * @param content  json字符串
	 * @param valueType  对象类型
	 * @return   对象
	 * @throws IOException 
	 * @throws JsonMappingException 
	 * @throws JsonParseException 
	 * @throws Exception
	 */
	public static  T objectFromJsonStr(String content,Class valueType) throws Exception {
		T obj = objectMapper.readValue(content, valueType);
		return obj;
	};
}