java實現響應重定向傳送post請求操作示例
阿新 • • 發佈：2020-04-13
本文例項講述了java實現響應重定向傳送post請求操作。分享給大家供大家參考，具體如下：
關於重定向我們用的比較多的還是redirect：重定向，預設傳送的get請求。
return "redirect:/index";
但有時候請求地址必須為post請求，比如security登入就只能接收post請求，下面來看一下如何後臺如何傳送post請求響應重定向。
首先可以定義一個map，用於存放參數鍵值對
Map<String,String> parameter = new HashMap<String,String>();
新增引數方法
public void setParameter(String key,String value) {
this.parameter.put(key,value);
}
傳送請求程式碼：
//url引數為請求地址
public void sendByPost(String url) throws IOException {
this.response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
PrintWriter out = this.response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD>");
out.println(" <meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">");
out.println(" <TITLE>loading</TITLE>");
out.println(" <meta http-equiv=\"Content-Type\" content=\"text/html charset=GBK\">\n");
out.println(" </HEAD>");
out.println(" <BODY>");
out.println("<form name=\"submitForm\" action=\"" + url + "\" method=\"post\">");
Iterator<String> it = this.parameter.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
out.println("<input type=\"hidden\" name=\"" + key + "\" value=\"" + this.parameter.get(key) + "\"/>");
}
out.println("</from>");
out.println("<script>window.document.submitForm.submit();</script> ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
RedirectWithPost請求類全部程式碼
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* 用POST方式 重定向
*
* @author royFly
*/
public class RedirectWithPost {
Map<String,String>();
HttpServletResponse response;
public RedirectWithPost(HttpServletResponse response) {
this.response = response;
}
public void setParameter(String key,String value) {
this.parameter.put(key,value);
}
public void sendByPost(String url) throws IOException {
this.response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
PrintWriter out = this.response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD>");
out.println(" <meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">");
out.println(" <TITLE>loading</TITLE>");
out.println(" <meta http-equiv=\"Content-Type\" content=\"text/html charset=GBK\">\n");
out.println(" </HEAD>");
out.println(" <BODY>");
out.println("<form name=\"submitForm\" action=\"" + url + "\" method=\"post\">");
Iterator<String> it = this.parameter.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
out.println("<input type=\"hidden\" name=\"" + key + "\" value=\"" + this.parameter.get(key) + "\"/>");
}
out.println("</from>");
out.println("<script>window.document.submitForm.submit();</script> ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
例項化RedirectWithPost請求類
RedirectWithPost redirectWithPost = new RedirectWithPost(response); //redirectUrl請求地址 String redirectUrl = "/login";
新增請求引數
redirectWithPost.setParameter("username",nickname);
redirectWithPost.setParameter("password",openid);
呼叫方法，傳送請求
redirectWithPost.sendByPost(redirectUrl);
更多關於java相關內容感興趣的讀者可檢視本站專題：《Java Socket程式設計技巧總結》、《Java檔案與目錄操作技巧彙總》、《Java資料結構與演算法教程》、《Java操作DOM節點技巧總結》和《Java快取操作技巧彙總》
希望本文所述對大家java程式設計有所幫助。