Exception in thread "main" java.lang.IllegalStateException: Invalid use of BasicClientConnectionMana

1.问题描述

Exception in thread "main" java.lang.IllegalStateException: Invalid use of BasicClientConnectionManager:

//获取请求url状态码为404的url
public class getUrlStatus {
    public static void main(String[] args) throws IOException {
        httpClientPost();
    }
    private static void httpClientPost() throws IOException {
        //String url = "http://liuxue.xdf.cn/blog/leiting";
        String[] urlStr = {
                "http://liuxue.xdf.cn/blog/aishanayinuer",
                "http://liuxue.xdf.cn/blog/anfei2",
                "http://liuxue.xdf.cn/blog/anhong",
                "http://liuxue.xdf.cn/blog/anhuijuan",
                "http://liuxue.xdf.cn/blog/金碧葳"
                   };
          //创建 高效缓冲输出流
          BufferedOutputStream bufOut = new  BufferedOutputStream(new  FileOutputStream("D:\404blog.txt"));
          for (String url : urlStr) {
              //获取连接（注意：每次client.execute(getMethod)之前，都必须new DefaultHttpClient();）否则报错：Exception in thread "main" java.lang.IllegalStateException: Invalid use of Basic...
              HttpClient client = new  DefaultHttpClient();//导入httpclient-4.5.6.jar
              HttpPost post = new HttpPost(url);
              try {
                   ContentProducer cp = new  ContentProducer() {
                        public void writeTo(OutputStream  outstream) throws IOException {
                             Writer writer = new  OutputStreamWriter(outstream, "UTF-8");
                             writer.write("");
                             writer.flush();
                        }
                   };
                   post.setEntity(new  EntityTemplate(cp));
                   
                   HttpResponse response =  client.execute(post);
                   StatusLine statusLine =  response.getStatusLine();//HTTP/1.1 404 Not Found
                   int statusCode =  statusLine.getStatusCode();//404
                   //System.out.println("http状态码：" +  statusLine);
                   if (statusCode==404) {
                        System.out.println("状态码：" +  statusCode);
                        System.out.println("url ：" +  url);
                        //写入文件
                        bufOut.write(url.getBytes());
                        bufOut.write("rn".getBytes());
                   }
                   
              } catch (ClientProtocolException e) {
                   e.printStackTrace();
              } catch (IOException e) {
                   e.printStackTrace();
              }
              //System.out.println("--------------------------------");
          }
          bufOut.close();
          System.out.println("写入成功！");
     }
}

（注意：每次client.execute(getMethod)之前，都必须new DefaultHttpClient();因为我是for循环多次请求url，多次获取连接，所以new DefaultHttpClient();要放在for循环内）否则报错：Exception in thread "main" java.lang.IllegalStateException: Invalid use of Basic...

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