msgexchange-api/src/main/java/com/gzzn/omms/msgexchangeapi/utils/JsonUtil.java

package com.gzzn.omms.msgexchangeapi.utils;

import java.io.IOException;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;

public class JsonUtil {
  public static String getString(Object object) 
  {
	try {
		ObjectMapper mapper = new ObjectMapper();
	    ObjectWriter ow = mapper.writer().withDefaultPrettyPrinter();
	    java.lang.String jsonStr;
		jsonStr = ow.writeValueAsString(object);
	    return jsonStr;
	} catch (JsonProcessingException e) {
		throw new RuntimeException(e);
	}
  } //end function
  
  /**
   * 获取json字符串去除值为null的key
   * @param object
   * @return json字符串
   */
  public static String getStringWithNoneKey(Object object) 
  {
	try {
		ObjectMapper mapper = new ObjectMapper();
		mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
		
	    ObjectWriter ow = mapper.writer().withDefaultPrettyPrinter();
	    java.lang.String jsonStr;
		jsonStr = ow.writeValueAsString(object);
	    return jsonStr;
	} catch (JsonProcessingException e) {
		throw new RuntimeException(e);
	}
  } //end function
  
  
  public static <T>  T getObject(String str,Class<T> valueType) throws JsonParseException, JsonMappingException, IOException
  {
	  ObjectMapper mapper = new ObjectMapper();
	  T obj = mapper.readValue(str, valueType);
	  
	  return obj;
  }
}