一,在后台程序中发送http请求获取响应数据
1)以 http://libs.baidu.com/jquery/2.0.0/jquery.min.js 为例
二,
1)添加utf-8解决乱码问题
String result="";
BufferedReader in = null;
URL url = null;
try {
url = new URL("http://libs.baidu.com/jquery/2.0.0/jquery.min.js");
} catch (MalformedURLException e) {
e.printStackTrace();
}
//打开连接
URLConnection connection = url.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,
image/webp,image/apng,*/*;q=0.8");
connection.setRequestProperty("accept-language", "zh-CN,zh;q=0.9");
connection.setRequestProperty("cache-control", "max-age=0");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("Accept-Charset", "UTF-8");
connection.setRequestProperty("user-agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36
(KHTML, like Gecko) Chrome/62.0.3202. 89 Safari/537.36");
// 建立实际的连接
connection.connect();
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream(),"UTF-8"));
//写出数据
String line;
while ((line = in.readLine()) != null) {
result += line;
}
//关流
in.close();
System.out.println(result);