import java.io.IOException;  
  
import com.alibaba.fastjson.JSON;  
import com.fasterxml.jackson.core.JsonParser;  
import com.fasterxml.jackson.databind.JsonNode;  
import com.fasterxml.jackson.databind.ObjectMapper;  
  
public class JsonUtil {  
      
    /** 
     * 將字符串轉(zhuǎn)成實(shí)體類，允許斜杠等字符串 
     */  
    public static <T> T jsonToEntity(String json, Class<T> clazz) throws IOException {  
        ObjectMapper mapper = new ObjectMapper();  
        // 允許反斜桿等字符  
        mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS,true);  
        return mapper.readValue(json, clazz);  
    }  
      
    /** 
     * 實(shí)體類轉(zhuǎn)JSON字符串 
     */  
    public static String entityToJson(Object entity){  
        return JSON.toJSONString(entity);  
    }  
      
    /** 
     * 將字符串轉(zhuǎn)成JsonNode，允許斜杠等字符串 
     */  
    public static JsonNode jsonToJsonNode(String json) throws IOException {  
        ObjectMapper mapper = new ObjectMapper();  
        // 允許反斜桿等字符  
        mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS,true);  
        //允許單引號(hào)  
        mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES,true);  
        return mapper.readValue(json, JsonNode.class);  
    }  
      
    public static <T> String objectToJson(Object object, Class<T> cls)throws Exception {  
        ObjectMapper mapper = new ObjectMapper();  
        mapper.registerSubtypes(cls);  
        String reqJson = mapper.writeValueAsString(object);  
        return reqJson;  
    }  
      
}  

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