java如何实现响应重定向发送post请求

2024-11-19 技术教程

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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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