java

package com.example.poi;

import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;
import java.io.*;

public class CompileTest {
    public static void main(String[] args) throws Exception {
        compileJava();
        compileGo();
    }
    
    private static void compileJava() throws Exception {
        String str = "public class A {\n" +
                "            public static void main(String[] args){\n" +
                "                System.out.println(\"Hello World!\");\n" +
                "            }\n" +
                "        }";
        // 生成一个java文件
        File file = new File("A.java");
        // 写入文件
        FileWriter fileWriter = new FileWriter(file);
        fileWriter.write(str);
        fileWriter.flush();
        fileWriter.close();
        // 编译java文件
        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
        int result = compiler.run(null, null, null, "-encoding", "utf-8", "A.java");
        System.out.println(result == 0 ? "编译成功" : "编译失败");
        // 执行A.class
        Process process = Runtime.getRuntime().exec("java A");
        // 获取执行结果
        getExecResult(process);
        // 删除文件
        boolean delete = file.delete();
        System.out.println(delete);

        File clazz = new File("A.class");
        boolean delete1 = clazz.delete();
        System.out.println(delete1);
    }
    
    private static void compileGo() throws Exception {
        // 编译并执行一段go代码
        String str = "package main\n" +
                "        import \"fmt\"\n" +
                "        func main(){\n" +
                "            fmt.Println(\"Hello World!\")\n" +
                "        }";
        // 生成一个go文件
        File file = new File("A.go");
        // 写入文件
        FileWriter fileWriter = new FileWriter(file);
        fileWriter.write(str);
        fileWriter.flush();
        fileWriter.close();
        // 编译go文件
        Process build = Runtime.getRuntime().exec("go build A.go");
        // build 执行完再往下执行
        build.waitFor();

        // 执行A.exe
        Process process = Runtime.getRuntime().exec("A.exe");
        process.waitFor();
        // 获取执行结果
        getExecResult(process);
        // 删除文件
        boolean delete = file.delete();
        System.out.println(delete);

        File exe = new File("A.exe");
        boolean delete1 = exe.delete();
        System.out.println(delete1);
    }

    private static void getExecResult(Process process) throws IOException {
        // 获取执行结果
        InputStream inputStream = process.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

        String line = "";
        StringBuffer sb = new StringBuffer();
        while((line = bufferedReader.readLine()) != null){
            sb.append(line);
        }
        bufferedReader.close();
        inputStream.close();
        System.out.println(sb);
    }

}