java获取文件大小文件上传速率,文件上传进度代码
时间: 2024-03-15 11:43:49 浏览: 53
Java Servlet简单实例分享(文件上传下载demo)
获取文件大小的代码:
```java
File file = new File("文件路径");
long fileSize = file.length();
```
文件上传速率和进度的代码:
```java
File file = new File("文件路径");
long fileSize = file.length();
BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
// 设置每次读取的大小为1KB
byte[] buffer = new byte[1024];
int len;
long uploadedSize = 0;
long startTime = System.currentTimeMillis();
while ((len = in.read(buffer)) != -1) {
// 进行文件上传操作
uploadedSize += len;
long currentTime = System.currentTimeMillis();
if (currentTime - startTime >= 1000) { // 每秒钟更新一次
double speed = (uploadedSize / 1024.0) / ((currentTime - startTime) / 1000.0);
System.out.println("上传速率为:" + speed + "KB/s");
double progress = uploadedSize * 1.0 / fileSize * 100;
System.out.println("上传进度为:" + progress + "%");
startTime = currentTime;
}
}
in.close();
```
注意,以上代码仅供参考,实际使用中需要根据具体的情况进行调整和优化。
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