java执行cmd命令超时,Java调用CMD执行命令

需要注意的有两点：

* 必须处理InputStream和ErrorStream，否则主线程会阻塞。这里我用了SequenceInputStream合并两条输入流。

* 字节流转字符流时要指定正确的编码，否则会乱码。

直接上代码了：

import org.junit.Test;

import java.io.*;

import java.util.ArrayList;

import java.util.List;

/**

* 命令行辅助工具

* @author jzhung

*/

public class Commander {

@Test

public void test() {

List cmds = new ArrayList<>();

cmds.add("ping 127.0.0.1");

cmds.add("ipconfig /all");

cmds.add("adb devices");

cmds.add("adb shell ls /system");

cmds.add("adb shell pm list packages");

try {

for (int i = 0; i < cmds.size(); i++) {

execute(cmds.get(i));

System.out.println("-----------------------------------------------------");

}

} catch (IOException e) {

e.printStackTrace();

}

}

public static void execute(String cmd) throws IOException {

Process process = Runtime.getRuntime().exec(cmd);

InputStream inStream = process.getInputStream();

InputStream errStream = process.getErrorStream();

SequenceInputStream sequenceIs = new SequenceInputStream(inStream, errStream);

BufferedInputStream bufStream = new BufferedInputStream(sequenceIs);

Reader reader = new InputStreamReader(bufStream, getDefaultEncoding());

BufferedReader bufReader = new BufferedReader(reader);

String line;

while ((line = bufReader.readLine()) != null) {

System.out.println(line);

}

inStream.close();

errStream.close();

process.destroy();

}

public static String getDefaultEncoding() {

if (getOS().trim().toLowerCase().startsWith("win")) {

return "GBK";

} else {

return "UTF-8";

}

}

public static String getOS() {

String os = System.getProperty("os.name");

System.out.println(os);

return os;

}

}