fastjson将复杂JSON串转成对象步骤

• 工具:
• 一、示例JSON
• 二、使用步骤
• • 1.使用工具将JSON串转成几个实体类
  • 2.利用fastjson转成实体类

JSON生成实体类网站: 点击此处

{
"code":200,
 "data":{
   "records":[
     {
     "id":"1360547626449233", 
       "name":"父字段", 
       "stock":"2000",
       "children":[
         {
         "id":"1360547626449233",
           "name":"子项目",
           "stock":"2000"
         },{
         "id":"123456",
           "name":"子项目2",
           "stock":2000
         }
       
       ]
     }
   ],
   "place":"河南"
  }
}

得到实体类代码如下：

package com.zheng.pojo;
public class JsonRootBean {
	private int code;
	private Data data;
	public void setCode(int code) {
		this.code = code;
	}
	public int getCode() {
		return code;
	}

	public void setData(Data data) {
		this.data = data;
	}

	public Data getData() {
		return data;
	}

	@Override
	public String toString() {
		return "JsonRootBean{" +
				"code=" + code +
				", data=" + data +
				'}';
	}
}

package com.zheng.pojo;
public class Data {

    private List records;
    private String place;
    public void setRecords(List records) {
         this.records = records;
     }
     public List getRecords() {
         return records;
     }

    public void setPlace(String place) {
         this.place = place;
     }
     public String getPlace() {
         return place;
     }

	@Override
	public String toString() {
		return "Data{" +
				"records=" + records +
				", place='" + place + ''' +
				'}';
	}
}

package com.zheng.pojo;
public class Records {
    private String id;
    private String name;
    private int stock;
    private List children;
    public void setId(String id) {
         this.id = id;
     }
     public String getId() {
         return id;
     }
    public void setName(String name) {
         this.name = name;
     }
     public String getName() {
         return name;
     }
    public int getStock() {
        return stock;
    }
    public void setStock(int stock) {
        this.stock = stock;
    }
    public void setChildren(List children) {
         this.children = children;
     }
     public List getChildren() {
         return children;
     }
    @Override
    public String toString() {
        return "Records{" +
                "id='" + id + ''' +
                ", name='" + name + ''' +
                ", stock=" + stock +
                ", children=" + children +
                '}';
    }
}

package com.zheng.pojo;
public class Children {
    private String id;
    private String name;
    private int stock;
    public void setId(String id) {
         this.id = id;
     }
     public String getId() {
         return id;
     }
    public void setName(String name) {
         this.name = name;
     }
     public String getName() {
         return name;
     }
    public int getStock() {
        return stock;
    }
    public void setStock(int stock) {
        this.stock = stock;
    }
	@Override
	public String toString() {
		return "Children{" +
				"id='" + id + ''' +
				", name='" + name + ''' +
				", stock=" + stock +
				'}';
	}
}

代码如下（示例）：

package com.zheng.javaPractice;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.comicyu.pojo.JsonRootBean;
public class JsonPractice {
	
	private static void jsonTansferObject() {
		String JsonStr = "{n" +
				""code":200,n" +
				" "data":{n" +
				"   "records":[n" +
				"     {n" +
				"     "id":"1360547626449233", n" +
				"       "name":"父字段", n" +
				"       "stock":2000,n" +
				"       "children":[n" +
				"         {n" +
				"         "id":"1360547626449233",n" +
				"           "name":"子项目",n" +
				"           "stock":2000n" +
				"         },{n" +
				"         "id":"123456",n" +
				"           "name":"子项目2",n" +
				"           "stock":2000n" +
				"         }n" +
				"       n" +
				"       ]n" +
				"     }n" +
				"   ],n" +
				"   "place":"河南"n" +
				"  }n" +
				"}";
	//转换对象成功,字段名一定全部小写
		JsonRootBean bean = JSONObject.parseObject(JsonStr, JsonRootBean.class);
		String data = bean.getData().toString();
		System.out.println(bean.toString());
	}

	public static void main(String[] args) {
		JsonPractice.jsonTansferObject();
	}
}

执行结果:

正确输出