java中postMethod_java实现post请求（PostMethod）

项目要求：实现post请求，且请求格式是json格式。

maven依赖包

org.apache.httpcomponents

httpclient

4.5.3

commons-httpclient

3.1

java代码实现：HttpClient httpClient = new HttpClient();

httpClient.getParams().setContentCharset("UTF-8");

PostMethod method = new PostMethod(url);

String str = "{\r\n" +

"\"beginDate\":\"2017-11-01\",\r\n" +

"\"endDate\":\"2017-11-01\"\r\n" +

"}";

RequestEntity entity = new StringRequestEntity(str,"application/json","UTF-8");

method.setRequestEntity(entity);

httpClient.executeMethod(method);

InputStream in = method.getResponseBodyAsStream();

//下面将stream转换为String

StringBuffer sb = new StringBuffer();

InputStreamReader isr = new InputStreamReader(in, "UTF-8");

char[] b = new char[4096];

for(int n; (n = isr.read(b)) != -1;) {

sb.append(new String(b, 0, n));

}

String returnStr = sb.toString();

System.out.println(returnStr);

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原文：http://qianqiansun.blog.51cto.com/13271301/1980711