java中mongdb的objectid序列化问题（返回json格式而不是字符串问题）

1.解决方式：

1.1Response统一返回控制

import org.bson.types.ObjectId;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializeConfig;
/**
 * 统一返回response控制
 * @author cf
 *
 */
@ControllerAdvice
public class MyResponseBodyAdvice implements ResponseBodyAdvice<Object>{

	 @Override
	    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
	        return true;
	    }

	    @Override
	    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,
	            Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request,
	            ServerHttpResponse response) {

	        SerializeConfig config = new SerializeConfig();
	        //解决mongdb id序列化问题
	        config.put(ObjectId.class, new ObjectIdJsonSerializer());
	        return JSONObject.parse(JSON.toJSONString(body, config));
	    }
	

}

1.2序列化时进行转换

package com.qjxs.advice;

import java.io.IOException;

import org.bson.types.ObjectId;

import com.alibaba.fastjson.serializer.JSONSerializer;
import com.alibaba.fastjson.serializer.ObjectSerializer;
import com.alibaba.fastjson.serializer.SerializeWriter;
import java.lang.reflect.Type;
/**
 * mongdb Object序列化问题
 * @author cf
 *
 */
public class ObjectIdJsonSerializer implements ObjectSerializer{

	
	 @Override
	    public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType,int features) throws IOException {
	        SerializeWriter out = serializer.getWriter();
	        if (object == null) {
	            serializer.getWriter().writeNull();
	            return;
	        }
	        out.write("\"" + ((ObjectId) object).toString() + "\"");
	    }
}