Java 使用Reader Grails发送openConnection内容中的formData

更新：这是一个副本

我正在用grails taglib构建一个代理自定义标记，默认情况下它会发出get请求，现在我面临的问题是，它应该也能够处理Post请求# 我能够检查request方法，并在必要时有条件地将openConnection方法设置为post，但我不知道如何将post参数附加到请求中。 这是到目前为止我的代码

def wordpressContent = { attrs, body ->
    def url
    def requestMethod = request.getMethod()
    def queryString = request.getQueryString()?'&'+request.getQueryString():''  
    def content
    println "method :"+requestMethod
    println "params == "+params   // <- inside here are the post-parameters
    url = grailsApplication.config.wordpress.server.url+attrs.pageName+'?include=true'+queryString  
    try {
        content = url.toURL().openConnection().with { conn ->
            if(requestMethod == 'POST'){
                println "Its a POST"
                conn.setRequestMethod("POST")
                conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
                    // HOW to append the params here ? 


            }
            readTimeout = 6000
            if( responseCode != 200 ) {
                throw new Exception( 'Not Ok' )
            }
            conn.content.withReader { r ->
                r.text
            }
        }
    }
    catch( e ) {
        println "exception : "+e
        content="<div class='float' style='margin-top:10px;width:850px;background-color:white;border-radius:5px;padding:50px;'>Hier wird gerade gebaut</div>"
    }
    out << content
}

但我不知道如何将其包含到我现有的代码中， 如需任何提示，请提前感谢

更新：我的解决方案是通过在模式“xyz=zyx&abc=cba”中的params对象上迭代来构建post参数querystring，并将其写入上述输出流

 // HTTP POST request
private void sendPost() throws Exception {

    String url = "https://selfsolve.apple.com/wcResults.do";
    URL obj = new URL(url);
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

    //add request header
    con.setRequestMethod("POST");
    con.setRequestProperty("User-Agent", USER_AGENT);
    con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");

    String urlParameters = "sn=C02G8416DRJM&cn=&locale=&caller=&num=12345";

    // Send post request
    con.setDoOutput(true);
    DataOutputStream wr = new DataOutputStream(con.getOutputStream());
    wr.writeBytes(urlParameters);
    wr.flush();
    wr.close();

    int responseCode = con.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    //print result
    System.out.println(response.toString());

}

您正在使用grails，因此也可以像下面这样使用groovy HTTPBuilder

---

可能是重复的，我更新了问题指出，我的特殊解决方案只是构建post param字符串并将其写入outputStream

 // HTTP POST request
private void sendPost() throws Exception {

    String url = "https://selfsolve.apple.com/wcResults.do";
    URL obj = new URL(url);
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

    //add request header
    con.setRequestMethod("POST");
    con.setRequestProperty("User-Agent", USER_AGENT);
    con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");

    String urlParameters = "sn=C02G8416DRJM&cn=&locale=&caller=&num=12345";

    // Send post request
    con.setDoOutput(true);
    DataOutputStream wr = new DataOutputStream(con.getOutputStream());
    wr.writeBytes(urlParameters);
    wr.flush();
    wr.close();

    int responseCode = con.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    //print result
    System.out.println(response.toString());

}