json对象的值为数组，怎么获取数组某项的值？（注意不是json数组） 如何获取json的数组数值
\u5982\u4f55\u83b7\u53d6jsonarray\u4e2d \u67d0\u4e2a\u503c1\u3001\u521b\u5efa\u4e00\u4e2ajsonArray\u5bf9\u8c61\u3002\u91cc\u9762\u5305\u542b\u91cd\u590d\u7684\u5185\u5bb9\uff0c\u5982\u56fe\u3002
2\u3001\u7136\u540e\u521b\u5efa\u4e00\u4e2aset\u96c6\u5408\uff0c\u56e0\u4e3aset\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u4e0d\u91cd\u590d\u5177\u6709\u53bb\u91cd\u7684\u6548\u679c\u3002
3\u3001\u901a\u8fc7\u5faa\u73af\u628ajsonArray\u5bf9\u8c61\u4e2d\u7684\u5143\u7d20\u90fd\u6dfb\u52a0\u5230set\u96c6\u5408\u4e14\u5148\u8f93\u51fa\u5143\u5bf9\u8c61\u7684\u5185\u5bb9\u6765\u770b\u6548\u679c\u3002
4\u3001\u628ajsonArray\u6dfb\u52a0\u5230set\u96c6\u5408\u540e\uff0c\u4ece\u4e0a\u4e00\u6b65\u53ef\u4ee5\u770b\u51fa\u662f3\u6761\u8bb0\u5f55\uff0c\u8fd9\u91cc\u628aset\u96c6\u5408\u7684\u957f\u5ea6\u8f93\u51fa\u770b\u4e0b\u5b83\u7684\u5927\u5c0f\u53ef\u4ee5\u53d1\u73b0\u53d8\u5c0f\u4e86\u3002
5\u3001\u518d\u628aset\u96c6\u5408\u8f6c\u6210\u5b57\u7b26\u4e32\u518d\u8f6c\u6362\u6210jsonArray\u5bf9\u8c61\u3002
6\u3001\u91cd\u65b0\u4f7f\u7528for\u5faa\u73af\u628a\u65b0\u8d4b\u503c\u7684jsonArray\u5bf9\u8c61\u503c\u8f93\u51fa\u5c31\u5b8c\u6210\u4e86\u3002
\u5728JS\u4e2d:
\u5047\u8bbe\u4f60\u7684json \u5bf9\u8c61\u662f jObject
\u83b7\u53d6\u6570\u7ec4
var picArr = jObject['taobao_pic_urls'];
\u83b7\u53d6\u5176\u4e2d\u7684\u67d0\u9879\u503c
var index = 0; //\u8981\u83b7\u53d6\u7684\u4e0b\u6807
var picUrl = picArr[index];
\u5728java\u4e2d:
\u53ef\u4ee5\u4f7f\u7528net.sf.JsonObject \u548c net.sf.JsonArray
\u5047\u8bbe\u4f60\u7684json \u5bf9\u8c61\u662f jObject net.sf.JsonObject\u5bf9\u8c61\u683c\u5f0f
\u83b7\u53d6\u6570\u7ec4
JosnArray jArray = jObject.getJSONArray("taobao_pic_urls");
\u83b7\u53d6\u5176\u4e2d\u7684\u67d0\u9879\u503c
int index = 0; //\u8981\u83b7\u53d6\u7684\u4e0b\u6807
String picUrl = String.valueOf(jArray.get(index));
package com;
import java.util.List;
import com.Kensou.Person;
import com.alibaba.fastjson.JSON;
public class Yuma
{
public static void main(String[] args)
{
String result =
"{\"data1\":[{\"name\":\"aa\",\"age\":\"12\"},{\"name\":\"bb\",\"age\":\"13\"}],\"data2\":{\"nowpage\":1,\"pagesize\":2}}";
Kensou ps = JSON.parseObject(result, Kensou.class);
System.out.println(ps);
List<Person> data1 = ps.getData1();
for(int i = 0; i < data1.size(); i++)
{
Person p = data1.get(i);
System.out.println(p);
}
Person data2 = ps.getData2();
System.out.println(data2);
}
}
/**
* 模型对象不需要构造函数， 至少只需要setter方法<br>
* Person类可以是内嵌类，也可以是外部类 <br>
* Kensou类只能是外部类<br>
* 集合类可以是数组或者List类型<br>
* <p>
* 使用的是<font color="red">fastjson-1.1.36.jar</font>
*/
class Kensou
{
private List<Person> data1;
private Person data2;
public List<Person> getData1()
{
return data1;
}
public void setData1(List<Person> data1)
{
this.data1 = data1;
}
public Person getData2()
{
return data2;
}
public void setData2(Person data2)
{
this.data2 = data2;
}
@Override
public String toString()
{
return String.format("Kensou [data1=%s, data2=%s]", data1, data2);
}
class Person
{
private String name;
private int age;
private int nowpage;
private int pagesize;
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
public int getNowpage()
{
return nowpage;
}
public void setNowpage(int nowpage)
{
this.nowpage = nowpage;
}
public int getPagesize()
{
return pagesize;
}
public void setPagesize(int pagesize)
{
this.pagesize = pagesize;
}
@Override
public String toString()
{
return String.format("Person [name=%s, age=%s, nowpage=%s, pagesize=%s]", name, age, nowpage, pagesize);
}
}
}
在JS中:
假设你的json 对象是 jObject
获取数组
var picArr = jObject['taobao_pic_urls'];
获取其中的某项值
var index = 0; //要获取的下标
var picUrl = picArr[index];
在java中:
可以使用net.sf.JsonObject 和 net.sf.JsonArray
假设你的json 对象是 jObject net.sf.JsonObject对象格式
获取数组
JosnArray jArray = jObject.getJSONArray("taobao_pic_urls");
获取其中的某项值
int index = 0; //要获取的下标
String picUrl = String.valueOf(jArray.get(index));
json对象的话应该直接可以取出来，你如果通过json方式取不出来很有可能是你的只是个json字符串通过eval("("+data+")");方式将json字符串转换为json对象就可以了
转化成对象
绛旓細鍙互浣跨敤net.sf.JsonObject 鍜 net.sf.JsonArray 鍋囪浣犵殑json 瀵硅薄鏄 jObject net.sf.JsonObject瀵硅薄鏍煎紡 鑾峰彇鏁扮粍 JosnArray jArray = jObject.getJSONArray("taobao_pic_urls");鑾峰彇鍏朵腑鐨勬煇椤瑰 int index = 0; //瑕佽幏鍙栫殑涓嬫爣 String picUrl = String.valueOf(jArray.get(index));
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绛旓細package com;import java.util.List;import com.Kensou.Person;import com.alibaba.fastjson.JSON;public class Yuma{public static void main(String[] args){String result = "{\"data1\":[{\"name\":\"aa\",\"age\":\"12\"},{\"name\":\"bb\",\"age\":\"13\"}],\"data2...
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