关于runtime.getruntime()

1.runtime.getruntime().exec()

调用外部程序独立启动。

外部调用临时批处理命令代码如下：

 import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;public class CheckStream extends Thread {BufferedReader bufferedReader;String lineRead = " ";/** * Constructor needs an InputStream to form an anonymous InputStreamReader * which is used to create a BufferedReader for reading the stream. */CheckStream(InputStream is) {this.bufferedReader = new BufferedReader(new InputStreamReader(is));}public void start() {try {while ((lineRead = bufferedReader.readLine()) != null);} catch (Exception ioe) {System.err.println("err!run: " + ioe.getMessage());}}}

 

 

 

public class RunExe {public RunExe() {}// 运行程序public static int RunFile(String filename) {try {Runtime ce = Runtime.getRuntime();Process p = ce.exec(filename);CheckStream csin = new CheckStream(p.getInputStream());CheckStream cserr = new CheckStream(p.getErrorStream());csin.start();cserr.start();p.waitFor();p.destroy();int return_value = p.exitValue();return return_value;} catch (Exception ex) {System.err.println("err!RunFile: " + filename);return -999;}}}