HttpClient4.x：Get和Post提交数据

一、Get提交方式

DefaultHttpClient httpclient = new DefaultHttpClient();
try {
//注：如果参数值为中文的话，提交过去后可能会是乱码
HttpGet httpget = new
HttpGet("http://www.xxx.com/x.jsp?username=zhangsan&age=20");
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
System.out.println("Login form get: " + response.getStatusLine());
//如果entity是流数据则关闭之
EntityUtils.consume(entity);
} finally {
// When HttpClient instance is no longer needed,
// shut down the connection manager to ensure
// immediate deallocation of all system resources
httpclient.getConnectionManager().shutdown();
}

二、Form表单Post提交方式

DefaultHttpClient httpclient = new DefaultHttpClient();
try {
HttpPost httpost = new HttpPost("http://www.xxx.com/x.jsp?");
List <NameValuePair> nvps = new ArrayList <NameValuePair>();
//提交两个参数及值
nvps.add(new BasicNameValuePair("age", "20"));
nvps.add(new BasicNameValuePair("username", "张三"));
//设置表单提交编码为UTF-8
httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
HttpResponse response = httpclient.execute(httpost);
HttpEntity entity = response.getEntity();
System.out.println("Login form get: " + response.getStatusLine());
EntityUtils.consume(entity);
} finally {
// When HttpClient instance is no longer needed,
// shut down the connection manager to ensure
// immediate deallocation of all system resources
httpclient.getConnectionManager().shutdown();
}

在提交到的x.jsp中，我们还是像平常获取一个form表单数据那样处理就行了：

String username = request.getParameter("username");