java.lang.Process 阻塞问题
2009-09-04 13:40
483 查看
关键字: javaProcess 类型对象的 waitFor() 方法的时候当前线程会被阻塞掉,因为InputStream in = Process.getInputStream();或 InputStream err = Process.getErrorStream(); 这2个流中的一个会被阻塞住,所以解决的办法可以是用多线程来解决,可以参看http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps_p.html 。
但还有另一种方法可以尝试,
Java代码 String[] cmds = {...};//command and arg
ProcessBuilder builder = new ProcessBuilder(cmds);
//both read inputstream and errstream
builder.redirectErrorStream(true);
Process process = builder.start();
BufferedReader br = new BufferedReader(new InputStreamReader(process
.getInputStream()));
String readLine = br.readLine();
while (readLine != null) {
System.out.println(readLine);
readLine = br.readLine();
}
int resultValue = process.waitFor();
String[] cmds = {...};//command and arg ProcessBuilder builder = new ProcessBuilder(cmds); //both read inputstream and errstream builder.redirectErrorStream(true); Process process = builder.start(); BufferedReader br = new BufferedReader(new InputStreamReader(process .getInputStream())); String readLine = br.readLine(); while (readLine != null) { System.out.println(readLine); readLine = br.readLine(); } int resultValue = process.waitFor();
builder.redirectErrorStream(true); 和BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream())); 这样使用就可以在一个线程中执行,而保证不被阻塞住。
相关文章推荐
- java.lang.Process调用程序阻塞问题解决
- java.lang.Process调用程序阻塞问题解决
- java.lang.Process调用程序阻塞问题解决
- java.lang.Process调用程序阻塞问题解决(刚刚遇到的问题,看有人解决了,转一下:) )
- java.lang.Process 阻塞问题
- java.lang.Process 阻塞问题
- java.lang.Process调用程序阻塞问题解决
- java.lang.Process 阻塞问题
- java处理Process输入流阻塞问题
- java process的waitfor()阻塞问题
- 使用Spring3最常见的问题:Exception: java.lang.IllegalStateException: CGLIB is required to process @Configurat
- Java.lang.Process需要注意的问题
- Java中Process和Runtime()使用,以及调用cmd命令阻塞在process.waitfor( )的问题解决
- 关于7.0手机爱贝支付转圈问题-java.lang.SecurityException: getSubscriberId: Neither user 10191 nor current process
- 关于Java Process 阻塞的问题
- android7.0闪退问题java.lang.SecurityException: MODE_WORLD_READABLE no longer supported
- java.lang.NoClassDefFoundError: javax/net/ssl/SSLSocket 问题解决
- 靠,终于搞定这个恶心的问题,java.lang.NoClassDefFoundError: org/jaxen/JaxenException
- Spring 集成Redis遇到问题nested exception is java.lang.ClassNotFoundException: redis.clients.jedis.JedisPoo
- java.lang.UnsupportedClassVersionError问题的解决方法