关于json对象转为java对象的问题

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先描述下问题：

         1、在写junit单元测试用例时，返回的json串转为java对象时不成功！出现错误提示

java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.xx.xx.modules.bd.entity.xx.xx。

        2、经过debug，发现对象属性全部都自动转为LinkedHashMap了,

content值为：{"statusCode":200,"msg":"成功返回","obj":[{"id":"41","isNewRecord":false,"remarks":"","createDate":"2016-08-28 09:03:52","updateDate":"2016-08-28 09:03:52","xxList":[],"xx":"","xx":"","xx":"","xx":"01","xx":"1","xx":45,"xxList":[]}]}

 

如图：

 


 

 
 

        3、JsonResp 代码：

package com.xxx.xxx.common.json;

import java.io.Serializable;

/**
 * json 返回
 * Created by weimingjia on 2016/7/10.
 */
public class JsonResp implements Serializable{

    private int statusCode = 200; //状态码
    private String msg;
    private Object obj;

    public JsonResp(){}

    public JsonResp(int statusCode,String msg){
        this.statusCode = statusCode;
        this.msg = msg;
    }

    public JsonResp(int statusCode,String msg,Object obj){
        this.statusCode = statusCode;
        this.msg = msg;
        this.obj = obj;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getObj() {
        return obj;
    }

    public void setObj(Object obj) {
        this.obj = obj;
    }

    public int getStatusCode() {
        return statusCode;
    }

    public void setStatusCode(int statusCode) {
        this.statusCode = statusCode;
    }
}

 

          4、jsonMapper代码：

 

/**
 * Copyright © 2012-2014 JeeSite All rights reserved.
 */
package com.xxx.xxx.common.mapper;

import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;

import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonParser.Feature;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.util.JSONPObject;
import com.fasterxml.jackson.module.jaxb.JaxbAnnotationModule;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

/**
 * 简单封装Jackson，实现JSON String<->Java Object的Mapper.
 * 封装不同的输出风格, 使用不同的builder函数创建实例.
 * @author ThinkGem
 * @version 2013-11-15
 */
public class JsonMapper extends ObjectMapper {

	private static final long serialVersionUID = 1L;

	private static Logger logger = LoggerFactory.getLogger(JsonMapper.class);

	private static JsonMapper mapper;

	public JsonMapper() {
		this(Include.NON_NULL);
	}

	public JsonMapper(Include include) {
		// 设置输出时包含属性的风格
		if (include != null) {
			this.setSerializationInclusion(include);
		}
		// 允许单引号、允许不带引号的字段名称
		this.enableSimple();
		// 设置输入时忽略在JSON字符串中存在但Java对象实际没有的属性
		this.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        // 空值处理为空串
		this.getSerializerProvider().setNullValueSerializer(new JsonSerializer