java实现下载文件到指定目录（项目亲测）
/**
* 下载文件到指定目录
* @param dowUrl:http地址
* @param dowPath:指定目录
* */
public static String download(String dowUrl, String dowPath){
try {
log.info("下载地址是："+dowUrl+",存储地址是："+dowPath);
URL url = new URL(dowUrl);
URLConnection urlConnection = url.openConnection();
HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;// http的连接类
//String contentType = ();//请求类型,可用来过滤请求，
httpURLConnection.setConnectTimeout(1000*5);//设置超时
httpURLConnection.setRequestMethod("POST");//设置请求方式，默认是GET
httpURLConnection.setRequestProperty("Charset", "UTF-8");// 设置字符编码
httpURLConnection.connect();// 打开连接
BufferedInputStream bin = new BufferedInputStream(httpURLConnection.getInputStream());
String path = dowPath;// 指定存放位置
File filed = new File(path);
OutputStream out = new FileOutputStream(filed);
int size = 0;
byte[] b = new byte[2048];
//把输入流的文件读取到字节数据b中，然后输出到指定目录的文件
while ((size = bin.read(b)) != -1) {
out.write(b, 0, size);
}
// 关闭资源
bin.close();
out.close();
return "200";
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "500";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "400";
}
}