本文实例讲述了java实现响应重定向发送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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