HTTP DELETE 始终返回 HTTP/400 错误消息

Question

我尝试通过以下代码执行 HTTP DELETE，但总是收到状态 400 的错误消息，我想知道我是否做错了。我不太确定是否需要使用 'httpCon.getInputStream();'

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

public class test {
        public static void main(String[] args) throws IOException {

        URL url = new URL("http://testurl.svc/web/testrequests/"+893488);

        StringBuffer xmlString = new StringBuffer();

        xmlString.append("<TestRequest>");
        xmlString.append("<DateRequested>2011-12-23</DateRequested>");
        xmlString.append("<ID>893488</ID>");
        xmlString.append("<Version>1</Version>");
        xmlString.append("<TestID>19104</TestID>");
        xmlString.append("<ProjectName>LTS</ProjectName>");
        xmlString.append("<RequestedBy>ktmq331</RequestedBy>");
        xmlString.append("<SampleNumber>SN1033646000</SampleNumber>");
        xmlString.append("<Status>Requested</Status>");
        xmlString.append("</TestRequest>");

        System.out.println("xmlString :" + xmlString.toString());

        System.out.println("URL : " + url);

        try {
            System.out.println("URL : " + url);
            HttpURLConnection httpCon = (HttpURLConnection) url.openConnection(); 
            httpCon.setDoOutput(true); 
            httpCon.setRequestProperty("Content-Type", "text/xml"); 
            httpCon.setRequestMethod("DELETE"); 
            httpCon.connect();
            httpCon.getInputStream();
            int responseCode = httpCon.getResponseCode();
            System.out.print("Response Code: "+responseCode);
            String responseString = httpCon.getResponseMessage();
            System.out.print("Response Message: "+responseString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Answer 1

如果您正在执行删除，则请求不应是 text/xml 类型（您甚至没有使用 xmlString 变量）。

基本上确保已设置：

httpCon.setRequestProperty("Content-Type", "application/x-www-form-urlencoded" );

而不是这个：

httpCon.setRequestProperty("Content-Type", "text/xml"); 

而且你不需要 getInputStream()。