java代码,计算单个程序的网络带宽占有率,不使用android包

以下是一个示例Java代码，用于计算单个程序的网络带宽占用率：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ProgramBandwidthCalculator {

    private static final String[] CMD_NETSTAT = {"netstat", "-ano"};

    private final String processName;
    private long bytesIn;
    private long bytesOut;

    public ProgramBandwidthCalculator(String processName) {
        this.processName = processName;
    }

    public void start() throws IOException {
        Process process = Runtime.getRuntime().exec(CMD_NETSTAT);
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line;
        while ((line = reader.readLine()) != null) {
            if (line.contains(processName)) {
                String[] parts = line.trim().split("\\s+");
                if (parts.length >= 4) {
                    bytesIn = Long.parseLong(parts[1]);
                    bytesOut = Long.parseLong(parts[2]);
                    break;
                }
            }
        }
        reader.close();
    }

    public double getBandwidthInMbps() throws IOException {
        long newBytesIn = getBytesIn(processName);
        double bytesPerSecond = (newBytesIn - bytesIn) / 1.0;
        return bytesPerSecond * 8 / 1000000; // convert to Mbps
    }

    public double getBandwidthOutMbps() throws IOException {
        long newBytesOut = getBytesOut(processName);
        double bytesPerSecond = (newBytesOut - bytesOut) / 1.0;
        return bytesPerSecond * 8 / 1000000; // convert to Mbps
    }

    private static long getBytesIn(String processName) throws IOException {
        return getBytes(processName, 1);
    }

    private static long getBytesOut(String processName) throws IOException {
        return getBytes(processName, 2);
    }

    private static long getBytes(String processName, int index) throws IOException {
        Process process = Runtime.getRuntime().exec(CMD_NETSTAT);
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line;
        long bytes = 0;
        while ((line = reader.readLine()) != null) {
            if (line.contains(processName)) {
                String[] parts = line.trim().split("\\s+");
                if (parts.length >= 4) {
                    bytes = Long.parseLong(parts[index]);
                    break;
                }
            }
        }
        reader.close();
        return bytes;
    }
}

使用示例：

ProgramBandwidthCalculator calculator = new ProgramBandwidthCalculator("chrome.exe");
calculator.start();
double bandwidthIn = calculator.getBandwidthInMbps();
double bandwidthOut = calculator.getBandwidthOutMbps();
System.out.println("Incoming bandwidth: " + bandwidthIn + " Mbps");
System.out.println("Outgoing bandwidth: " + bandwidthOut + " Mbps");

注意：该示例代码仅适用于Windows系统，Linux和MacOS系统可能需要使用不同的命令。另外，程序名称需要与操作系统中的实际进程名称匹配。