JAVA中执行多条shell/bat命令

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本文介绍如何使用Java程序调用Shell命令并获取其输出。包括单个命令的执行及多个命令间存在依赖时的处理方式。

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java调用process执行命令

public class ShellUtil {
    public static String runShell(String shStr) throws Exception {

        Process process;
        process = Runtime.getRuntime().exec(new String[]{"/bin/sh","-c",shStr});
        process.waitFor();
        BufferedReader read = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line = null;
        String result = "";
        while ((line = read.readLine())!=null){
            result+=line;
        }
        return result;
    }
}

注意：如果是windows操作系统要改为Runtime.getRuntime().exec(new String[]{"**cmd** exe","-c","command"});

1.当要执行多条时且不依赖事务，可以分开多次调用

public class ExecuteShell {
    public static void main (String[] args){
        String command1 = "some command";
        String command2 = "some command";
        String message1 = ShellUtil.runShell(command1);
        String message2 = ShellUtil.runShell(command2);
        System.out.println(message1);
        System.out.println(message2);
    }
}

2.但是当命令之间有事务依赖时，比如一条命令是登录数据库，第二条执行查询语句，上面分开多次调用的方式就不行。需要做改动如下

public class ExecuteShell {
    public static void main (String[] args){
        String command1 = "some command";
        String command2 = "some command";
        String command = command1 + " && " + command2;
        String message = ShellUtil.runShell(command);
        System.out.println(message);
    }
}