java + httpclient +post请求(记录下)
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public void testMethodpost(){//初始化http请求
CloseableHttpClient httpclient=HttpClientBuilder.create().build();
String url = "xxxxxxxxxxxxx";
//初始化http请求
HttpPost post=new HttpPost(url);
//设置请求头
post.setHeader("Content-Type","application/json;charset=UTF-8");
try {
String paramJson="{\"userName\":\"xxxxxxx\",\"passWord\":\"JVGK+jDLU7\"}";
// JSONObject jsonObject = JSON.parseObject(paramJson);
//
// System.out.println(jsonObject);
// String param=JSON.toJSONString(jsonObject);
// 提交参数发送请求
StringEntity requestEntity = new StringEntity(paramJson,"UTF-8");
post.setEntity(requestEntity);
CloseableHttpResponse response=httpclient.execute(post);
HttpEntity entity=response.getEntity();
String entityStr =EntityUtils.toString(entity,"UTF-8");
System.out.println(entityStr);
//httpclient.close();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
遇到的坑:
1.前期使用POST数据时,用了UrlEncodedFormEntity()这个方法
结果服务器返回500,打印的请求参数为:key=value&key2=value2格式
解决办法:使用 StringEntity requestEntity = new StringEntity(paramJson,"UTF-8");办法解决
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