Example usage for java.io FileOutputStream write

Introduction

In this page you can find the example usage for java.io FileOutputStream write.

Prototype

public void write(byte b[], int off, int len) throws IOException

Source Link

Document

Writes len bytes from the specified byte array starting at offset off to this file output stream.

Usage

From source file:cn.newtouch.util.HttpClientUtil.java

/**
 * //from   w  w  w  .  j a  v a  2  s  .  c om
 * 
 * @param fileUrl
 *            url
 * @param path
 *            ??
 * @param newFilename
 *            ????null??? ??
 * @return ?
 */
public static void downloadFile(String fileUrl, String path, String newFilename) throws Exception {
    if (StringUtils.isEmpty(fileUrl)) {
        throw new Exception("??");
    }
    if (StringUtils.isEmpty(newFilename)) {
        newFilename = fileUrl.substring(fileUrl.lastIndexOf("/"));
    }
    HttpClient client = new HttpClient();
    GetMethod httpGet = new GetMethod(fileUrl);
    try {
        client.executeMethod(httpGet);

        InputStream in = httpGet.getResponseBodyAsStream();
        File outFile = new File(path + File.separator + newFilename);
        if (outFile.exists()) {
            throw new Exception("?");
        }
        FileOutputStream out = new FileOutputStream(outFile);

        byte[] b = new byte[BUFFER];
        int len = 0;
        while ((len = in.read(b)) != -1) {
            out.write(b, 0, len);
        }
        in.close();
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
        throw new Exception("" + e.getMessage());
    } finally {
        httpGet.releaseConnection();
    }
}