public class Jsonutil {
/**
* get "array form" JSON data, data form: [{"id": 1, "name": "nickname"},{"id": 2, "name": "Xiao Li"}]
*
* @param path
* Web Path
* @return Back to List
* @throws Exception
*/
public static string Getjsonarray (string path) throws Exception {
String json = NULL;
URL url = new URL (path);
// LOG.D ("", "*********************url=" +url+ "**************************");
HttpURLConnection conn = (httpurlconnection) url.openconnection ();//using the HttpURLConnection object, we can get the Web page data from the network.
Conn.setrequestproperty ("Connection", "keep-alive");
Conn.setdooutput (TRUE);
Conn.setdoinput (TRUE);
Conn.setrequestproperty ("Accept", "*/*");
Conn.setrequestproperty ("User-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ");
Conn.setconnecttimeout (20000);
Conn.setreadtimeout (20000);
if (conn.getresponsecode () = = 200) {//Determine if the request code is 200 yards, otherwise failed
InputStream is = Conn.getinputstream (); Get input stream
byte[] data = Readstream (IS); Convert input flow to character array
JSON = new String (data); Converts a character array to a string
}
return JSON;
}
/**
* Convert input flow to character array
*
* @param inputstream
* Input Stream
* @return Character array
* @throws Exception
*/
public static byte[] Readstream (InputStream inputstream) throws Exception {
Bytearrayoutputstream bout = new Bytearrayoutputstream ();
byte[] buffer = new byte[1024];
int len = 0;
while (len = inputstream.read (buffer))! =-1) {
Bout.write (buffer, 0, Len);
}
Bout.close ();
Inputstream.close ();
return Bout.tobytearray ();
}
/**
* Check if there is an int for the corresponding field in Jsonobject and return the corresponding value if it exists
*
* @param Object
* @param val
* @return
* @throws org.json.JSONException
*/
public static int Checkandgetint (Jsonobject object, String val)
Throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Object.getint (Val);
} else {
return-1;
}
} catch (Jsonexception e) {
return-1;
}
}
/**
* Check if there is an int for the corresponding field in Jsonobject and return the corresponding value if it exists
*
* @param Object
* @param val
* @return
* @throws org.json.JSONException
*/
public static int Checkandgetintwithdefault (Jsonobject object, String Val,
int result) throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Object.getint (Val);
} else {
return result;
}
} catch (Jsonexception e) {
return result;
}
}
/**
* check if a string of the corresponding field exists in Jsonobject and return the corresponding value if it exists
*
* @param Object
* @param val
* @return
* @throws org.json.JSONException
*/
public static string Checkandgetstring (Jsonobject object, String val)
Throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Object.getstring (Val);
} else {
Return "";
}
} catch (Jsonexception e) {
Return "";
}
}
/**
* check if a string of the corresponding field exists in Jsonobject, return the corresponding value if it exists, otherwise return the default value
*
* @param Object
* @param val
* @param value
* @return
* @throws jsonexception
*/
public static String Checkandgetstringwithdefault (Jsonobject object,
String val, String value) throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Object.getstring (Val);
} else {
return value;
}
} catch (Jsonexception e) {
return value;
}
}
/**
* Check if there is a corresponding field jsonarray in Jsonobject if there is a corresponding value returned
*
* @param Object
* @param val
* @return
* @throws org.json.JSONException
*/
public static Jsonarray Checkandgetarray (Jsonobject object, String val)
Throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Object.getjsonarray (Val);
} else {
return new Jsonarray ();
}
} catch (Jsonexception e) {
return new Jsonarray ();
}
}
/**
* Check if there is a double for the corresponding field in Jsonobject, if there is a return value
*
* @param Object
* @param val
* @return
* @throws org.json.JSONException
*/
public static Double checkandgetdouble (Jsonobject object, String val)
Throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Object.getdouble (Val);
} else {
return-1.0;
}
} catch (Jsonexception e) {
return-1.0;
}
}
/**
* Check Jsonobject for the existence of the corresponding field of float, if there is a return value
*
* @param Object
* @param val
* @return
* @throws org.json.JSONException
*/
public static Float Checkandgetfloat (Jsonobject object, String val)
Throws Jsonexception {
try {
if (Object.has (val) && object.get (val) = null) {
Return Float.parsefloat (Object.getstring (Val));
} else {
return-1.0f;
}
} catch (Jsonexception e) {
return-1.0f;
}
}
}
Android==>json parsing
