Java 调用系统命令 Runtime Process ProcessBuilder

Java 调用系统命令 Cmder

waitFor()

package southday.java.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.List;

/**
* 命令行工具
* @author southday
* @date 2017年3月7日
*/
public class Cmder {
public Cmder() {
super();
}

private static class StreamReaderThread implements Runnable {
InputStream ins = null;

public StreamReaderThread(InputStream ins) {
this.ins = ins;
}

@Override
public void run() {
BufferedReader br = new BufferedReader(new InputStreamReader(ins));
try {
String line = null;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
FileUtil.closeSource(ins);
FileUtil.closeSource(br);
}
}
}

/**
* 执行系统命令
* @param cmd        完整命令，如："tar -xvf sql_scripts.tar -C ."
* @param directory  命令在指定目录下执行
* @return
*/
public static boolean exec(String cmd, String directory) {
List<String> cmds = Arrays.asList(cmd.split("\\s+"));
return exec(cmds, directory);
}

/**
* 执行系统命令
* @param cmds       完整命令以空格分割得到List
* @param directory  命令在指定目录下执行
* @return
*/
public static boolean exec(List<String> cmds, String directory) {
printCurrentDIR(directory);
printCmd(cmds);
try {
ProcessBuilder procBuilder = new ProcessBuilder(cmds);
if (directory != null && directory.trim().length() > 1) {
procBuilder.directory(new File(directory));
}
procBuilder.redirectErrorStream(true);
Process proc = procBuilder.start();
new Thread(new StreamReaderThread(proc.getInputStream())).start();
new Thread(new StreamReaderThread(proc.getErrorStream())).start();
proc.waitFor();
proc.destroy();
if (proc.exitValue() != 0) {
return false;
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}

/**
* 打印命令信息
* @param cmds
*/
public static void printCmd(List<String> cmds) {
StringBuilder sb = new StringBuilder();
for (String s : cmds) {
sb.append(s + " ");
}
System.out.println("[cmd] -> " + sb.toString());
}

/**
* 打印命令执行的当前目录
* @param directory
*/
private static void printCurrentDIR(String directory) {
if (directory == null || directory.trim().length() < 1) {
directory = System.getProperty("user.dir");
}
System.out.println("[directory] -> " + directory);
}
}