Java之Json
2015-06-18 14:25
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Json(JavaScript Object Notation)是一种数据交换格式,是纯文本格式。实例:
{student:
[
{sid:1,sname:tiny,sage:23},
{sid:2,sname:little,sage:25},
{sid:3,sname:small,sage:24}
]
}
Java中需要先打专门的Json的jar包,然后才能封装与解析Json格式:
封装:
JSONObject jsobj = new JSONObject();
JSONArray jsarr = jsobj.getJSONArray();
for(int i = 0; i < 3; i++){
JSONObject jscobj = jsarr.getJSONObject(i);
jscobj.put("sid",i+1);
jscobj.put("sname","张三"+i);
jscobj.put("sage",""+(20+i));
jsarr.put(jscobj);
}
jsobj.put("student",jsarr);
解析:
String str = "{student:[{sid:1,sname:tiny,sage:23}, {sid:2,sname:little,sage:25},{sid:3,sname:small,sage:24}]}";
JSONObject jsobj = new JSONObject(str);
JSONArray jsarr = jsobj.getJSONArray("student");
for(int i = 0; i < 3; i++){
JSONObject jscobj = jsarr.getJSONObject(i);
String sid = jscobj.getString("sid");
String sname = jscobj.getString("sname");
String sage = jscobj.getString("sage");
System.out.println("sid:"+sid+"sname:"+sname+"sage:"+sage);
}
{student:
[
{sid:1,sname:tiny,sage:23},
{sid:2,sname:little,sage:25},
{sid:3,sname:small,sage:24}
]
}
Java中需要先打专门的Json的jar包,然后才能封装与解析Json格式:
封装:
JSONObject jsobj = new JSONObject();
JSONArray jsarr = jsobj.getJSONArray();
for(int i = 0; i < 3; i++){
JSONObject jscobj = jsarr.getJSONObject(i);
jscobj.put("sid",i+1);
jscobj.put("sname","张三"+i);
jscobj.put("sage",""+(20+i));
jsarr.put(jscobj);
}
jsobj.put("student",jsarr);
解析:
String str = "{student:[{sid:1,sname:tiny,sage:23}, {sid:2,sname:little,sage:25},{sid:3,sname:small,sage:24}]}";
JSONObject jsobj = new JSONObject(str);
JSONArray jsarr = jsobj.getJSONArray("student");
for(int i = 0; i < 3; i++){
JSONObject jscobj = jsarr.getJSONObject(i);
String sid = jscobj.getString("sid");
String sname = jscobj.getString("sname");
String sage = jscobj.getString("sage");
System.out.println("sid:"+sid+"sname:"+sname+"sage:"+sage);
}
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