java实现响应重定向发送post请求操作示例

本文实例讲述了java实现响应重定向发送post请求" title="post请求">post请求操作。分享给大家供大家参考,具体如下:

关于重定向我们用的比较多的还是redirect:重定向,默认发送的get请求。

return "redirect:/index";

但有时候请求地址必须为post请求,比如security登录就只能接收post请求,下面来看一下如何后台如何发送post请求响应重定向。

首先可以定义一个map,用于存放参数键值对

Map<String, String> parameter = new HashMap<String, String>();

添加参数方法

public void setParameter(String key, String value) {

this.parameter.put(key, value);

}

发送请求代码:

//url参数为请求地址

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请求类全部代码

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> parameter = new HashMap<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();

}

}

实例化RedirectWithPost请求类

RedirectWithPost redirectWithPost = new RedirectWithPost(response);

//redirectUrl请求地址

String redirectUrl = "/login";

添加请求参数

redirectWithPost.setParameter("username", nickname);

redirectWithPost.setParameter("password", openid);

调用方法,发送请求

redirectWithPost.sendByPost(redirectUrl);

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