Java执行外部程序并返回结果

import java.io.*;

/**
 * 示例：执行进程并返回结果
 */
public class ProcessExecutor {

    public static final int SUCCESS = 0;            // 表示程序执行成功

    public static final String COMMAND = "java.exe -version";    // 要执行的语句

    public static final String SUCCESS_MESSAGE = "程序执行成功！";

    public static final String ERROR_MESSAGE = "程序执行出错：";

    public static void main(String[] args) throws Exception {

        // 执行程序
        Process process = Runtime.getRuntime().exec(COMMAND);

        // 打印程序输出
        readProcessOutput(process);

        // 等待程序执行结束并输出状态
        int exitCode = process.waitFor();

        if (exitCode == SUCCESS) {
            System.out.println(SUCCESS_MESSAGE);
        } else {
            System.err.println(ERROR_MESSAGE + exitCode);
        }
    }

    /**
     * 打印进程输出
     *
     * @param process 进程
     */
    private static void readProcessOutput(final Process process) {
        // 将进程的正常输出在 System.out 中打印，进程的错误输出在 System.err 中打印
        read(process.getInputStream(),System.out);
        read(process.getErrorStream(),System.err);
    }

    // 读取输入流
    private static void read(InputStream inputStream,PrintStream out) {
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

            String line;
            while ((line = reader.readLine()) != null) {
                out.println(line);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {

            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}