Java後臺傳送Post和get請求 (並解決返回值亂碼問題)
阿新 • • 發佈:2019-02-03
public class HttpRequest {
/**
* 向指定URL傳送GET方法的請求
*
* @param url
* 傳送請求的URL
* @param param
* 請求引數,請求引數應該是 name1=value1&name2=value2 的形式。
* @return URL 所代表遠端資源的響應結果
*/
public static String sendGet(String url, String param) {
String result = "" ;
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 開啟和URL之間的連線
URLConnection connection = realUrl.openConnection();
// 設定通用的請求屬性
connection.setRequestProperty("accept" , "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
connection.setRequestProperty("Accept-Charset", "utf-8");
connection.setRequestProperty("contentType" , "utf-8");
// 建立實際的連線
connection.connect();
// 獲取所有響應頭欄位
Map<String, List<String>> map = connection.getHeaderFields();
// 遍歷所有的響應頭欄位
for (String key : map.keySet()) {
// System.out.println(key + "--->" + map.get(key));
}
// 定義 BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(new InputStreamReader(
connection.getInputStream(),"utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("傳送GET請求出現異常!" + e);
e.printStackTrace();
}
// 使用finally塊來關閉輸入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 傳送POST方法的請求
*
* @param url
* 傳送請求的 URL
* @param param
* 請求引數,請求引數應該是 name1=value1&name2=value2 的形式。
* @return 所代表遠端資源的響應結果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 開啟和URL之間的連線
URLConnection conn = realUrl.openConnection();
// 設定通用的請求屬性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 傳送POST請求必須設定如下兩行
conn.setDoOutput(true);
conn.setDoInput(true);
// 獲取URLConnection物件對應的輸出流
out = new PrintWriter(conn.getOutputStream());
// 傳送請求引數
out.print(param);
// flush輸出流的緩衝
out.flush();
// 定義BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("傳送 POST 請求出現異常!"+e);
e.printStackTrace();
}
//使用finally塊來關閉輸出流、輸入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
public static void main(String[] args) {
//傳送 GET 請求
// System.out.println(s);
JcLogEntity f=getJcLogData("10.141.71.251:8080").get(1);
System.out.println(f.getTitle());
}
public static ArrayList<CmsUserInfo> getData(String ipport)
{
System.out.println(ipport);
String s=HttpRequest.sendGet("http://"+ipport+"/spcms/mobile/info/getlist.jspx?pageSize=15&pageNow=1&timeStamp=1431678427563", "");
System.out.println(s);
JSONArray us=JSON.parseObject(s).getJSONArray("data");
ArrayList<CmsUserInfo> al=new ArrayList<CmsUserInfo>();
for(int i=0;i<us.size();i++)
{
String temp=us.get(i).toString();
System.out.println(temp );
CmsUserInfo cui=(CmsUserInfo) JSON.parseObject(temp.replaceAll("GPS","gps"), CmsUserInfo.class);
System.out.println(cui.getGps());
al.add(cui);
}
return al;
//System.out.print(al.size() );
}
public static List<JcLogEntity> getJcLogData(String ipport)
{
System.out.println(ipport);
String s=HttpRequest.sendGet("http://"+ipport+"/spcms/datatransfer/getLog.jspx?pageSize=99999&timeStamp=1431678427563", "");
System.out.println(s);
List<JcLogEntity> re= JSONUtils.jsonToEntityArray(s,JcLogEntity.class);
return re;
}
亂碼問題解決辦法:
connection.setRequestProperty("Accept-Charset", "utf-8");
connection.setRequestProperty("contentType", "utf-8");
in = new BufferedReader(new InputStreamReader( connection.getInputStream(),"utf-8"));
轉自:http://www.aichengxu.com/view/54381