java中实现响应重定向post请求：

  • 本人主要用来解决的问题为：单点登录中本系统登录的问题，重定向默认为为get请求。不安全，如需使用post可使用如下代码，亲测有效。

一.编写RedirectWithPost类

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();
  }
}

二.业务类重定向代码：

private  void loginTokenApi(HttpServletResponse httpServletResponse, String username, String password) throws IOException, ServletException {
        RedirectWithPost redirectWithPost = new RedirectWithPost(httpServletResponse);
        //redirectUrl请求地址
        String redirectUrl = "/loginRecordApi";
        redirectWithPost.setParameter("username", username);
        redirectWithPost.setParameter("password", password);
        redirectWithPost.sendByPost(redirectUrl);
    }