Java執行外部程序并返回結果

import java.io.*;

/**

示例：執行進程并返回結果
*/
public class ProcessExecutor {
public static final int SUCCESS = 0;            // 表示程序執行成功
public static final String COMMAND = "java.exe -version";    // 要執行的語句
public static final String SUCCESS_MESSAGE = "程序執行成功！";
public static final String ERROR_MESSAGE = "程序執行出錯：";
public static void main(String[] args) throws Exception {

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

 // 打印程序輸出
 readProcessOutput(process);

 // 等待程序執行結束并輸出狀態
 int exitCode = process.waitFor();

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

}
/**

打印進程輸出
*
@param process 進程
*/
private static void readProcessOutput(final Process process) {
 // 將進程的正常輸出在 System.out 中打印，進程的錯誤輸出在 System.err 中打印
 read(process.getInputStream(), System.out);
 read(process.getErrorStream(), System.err);
}
// 讀取輸入流
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();
 }

}
}
}</pre>