如何在Linux中执行Shell脚本？

Question

我想写一个Java代码，可以在Windows和Linux机器上使用，为Ethereum合约生成字节码。

我不熟悉shell脚本和linux，从我在互联网上读到的东西，我将能够通过bash执行以下批处理文件......但不幸的是，我得到了它不工作。我的代码是针对windows和linux的，并且为windows生成一个批处理文件，为linux生成一个shell文件，这到底是什么问题？

这段代码在linux下应该怎么用？在windows下，这段代码工作得很好。

        String delim="";
        String scriptName="";
        String cmd="";
        if (Linux) {
            delim = "/";
            scriptName="compile.sh";
            cmd = "bash /c compile.sh";
        }
        else {
            delim = "\\";
            scriptName="compile.bat";
            cmd = "cmd /c compile.bat";
        }


        String UUID = __SolidityFile.getValue(getContext(),"__UUID__");
        String firstFolder = UUID.substring(0, 2);
        String secondFolder = UUID.substring(2, 4);
        String secondFolderLocation=com.mendix.core.Core.getConfiguration().getBasePath()+delim+"data"+delim+"files"+delim + firstFolder+ delim + secondFolder ;
        String fileLocation=secondFolderLocation+ delim + UUID;
        Core.getLogger("Solidity").info(fileLocation);

        String solc =com.mendix.core.Core.getConfiguration().getResourcesPath()+delim+"node"+delim+"node_modules"+delim+"solc"+delim+"solcjs";
        String node=com.mendix.core.Core.getConfiguration().getResourcesPath()+delim+"node.exe";

        try {
              //  Block of code to try
            final File file = new File(secondFolderLocation+delim+scriptName);
            file.createNewFile();
            PrintWriter writer = new PrintWriter(file, "UTF-8");
            writer.println("cd "+secondFolderLocation);
            writer.println(node+" "+ solc +" " +UUID +" --bin");
            writer.println("exit");
            writer.close();
            Process p =  Runtime.getRuntime().exec(cmd, null, new File(secondFolderLocation));
            p.waitFor();
            //file.delete();

            String byteCodeFile = "";
            String byteFileType = ByteCodeType.getCaption();

            switch (byteFileType) {
            case "TestToken": 
                 byteCodeFile =  fileLocation+"_TESTTOKEN.bin" ;
                 break;

            case "SafeMath": 
                 byteCodeFile =  fileLocation+"_SafeMath.bin" ;
                 break;

            case "Owned": 
                 byteCodeFile =  fileLocation+"_Owned.bin" ;
                 break;

            case "ERC20Interface": 
                 byteCodeFile =  fileLocation+"_ERC20Interface.bin" ;
                 break;

            case "ApproveAndCallFallBack": 
                 byteCodeFile =  fileLocation+"_ApproveAndCallFallBack.bin" ;
                 break;  
            }

            Core.getLogger("Solidity").info(byteCodeFile);
            Scanner scanner = new Scanner( new File(byteCodeFile), "UTF-8" );
            String text = scanner.useDelimiter("\\A").next();
            scanner.close();
            return text;



    }
        catch(Exception e) {
              //  Block of code to handle errors
            return null ;
            }

Answer 1

试着做吧。

当是Linux环境。

移除 bash /c

cmd = "/usr/local/bin/compile.sh";

你需要另一个环境条件(if)来运行下面的代码。

ProcessBuilder pb = new ProcessBuilder(cmd);
Process p = pb.start();

请你试一试，然后告诉我

我的代码

文件 optdevelopmentworkpacetestessrctestesMain.java

package testes;

import java.io.IOException;

public class Main {

    public static void main(String[] args) throws IOException {
        String cmd = "/opt/development/workspace/testes/src/testes/script.sh";

        ProcessBuilder pb = new ProcessBuilder(cmd);

        Process p = pb.start();

        System.out.println(p);
    }

}

文件script.sh

mkdir stackoverfllow

文件夹已在 optdevelopmentworkspacetestes中创建。