Java 调用系统命令 Runtime Process ProcessBuilder

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Java 调用系统命令 Cmder

包括对waitFor()阻塞的处理
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);    }}
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