前段时间在工作中遇到这样一个问题，java代码中调用一个bat程序，在linux下执行完好，但是换到windows下就一直挂在那里不动了~
代码如下：
public class CMDTest {
public static void main(String[] args) {
Process p = null;
p = Runtime.getRuntime().exec("c:\\test.bat");
p.waitFor();
System.out.println(p.exitValue());
System.out.println("over");
} catch (Exception e) {
e.printStackTrace();
其中，test.bat里就是一些命令操作，在这里就写一个简单的ping命令。
上面的代码运行之后，等了半天都没反应。Process的api中有如下说明：
ProcessBuilder.start() 和 Runtime.exec 方法创建一个本机进程，并返回 Process 子类的一个实例，该实例可用来控制进程并获得相关信息。Process 类提供了执行从进程输入、执行输出到进程、等待进程完成、检查进程的退出状态以及销毁（杀掉）进程的方法。
创建进程的方法可能无法针对某些本机平台上的特定进程很好地工作，比如，本机窗口进程，守护进程，Microsoft Windows 上的 Win16/DOS 进程，或者 shell 脚本。创建的子进程没有自己的终端或控制台。它的所有标准 io（即 stdin、stdout 和 stderr）操作都将通过三个流 (getOutputStream()、getInputStream() 和 getErrorStream()) 重定向到父进程。父进程使用这些流来提供到子进程的输入和获得从子进程的输出。因为有些本机平台仅针对标准输入和输出流提供有限的缓冲区大小，如果读写子进程的输出流或输入流迅速出现失败，则可能导致子进程阻塞，甚至产生死锁。
也就是说：如果程序不断在向标准输出流和标准错误流写数据，而JVM不读取的话，当缓冲区满之后将无法继续写入数据，最终造成阻塞在waitFor()这里。
这就是问题所在！之后我查了下网上的解决办法，多数是创建两个线程在waitFor()命令之前读出窗口的标准输出缓冲区和标准错误流的内容。
按照这个思路，我写了如下util方法
import java.io.BufferedR
import java.io.IOE
import java.io.InputS
import java.io.InputStreamR
import java.util.ArrayL
import java.util.L
public class CommandUtil {
// 保存进程的输入流信息
private List&String& stdoutList = new ArrayList&String&();
// 保存进程的错误流信息
private List&String& erroroutList = new ArrayList&String&();
public void executeCommand(String command) {
stdoutList.clear();
erroroutList.clear();
Process p = null;
p = Runtime.getRuntime().exec(command);
// 创建2个线程，分别读取输入流缓冲区和错误流缓冲区
ThreadUtil stdoutUtil = new ThreadUtil(p.getInputStream(), stdoutList);
ThreadUtil erroroutUtil = new ThreadUtil(p.getErrorStream(), erroroutList);
//启动线程读取缓冲区数据
stdoutUtil.start();
erroroutUtil.start();
p.waitFor();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
public List&String& getStdoutList() {
return stdoutL
public List&String& getErroroutList() {
return erroroutL
class ThreadUtil implements Runnable {
// 设置读取的字符编码
private String character = "GB2312";
private List&String&
private InputStream inputS
public ThreadUtil(InputStream inputStream, List&String& list) {
this.inputStream = inputS
this.list =
public void start() {
Thread thread = new Thread(this);
thread.setDaemon(true);//将其设置为守护线程
thread.start();
public void run() {
BufferedReader br = null;
br = new BufferedReader(new InputStreamReader(inputStream, character));
String line = null;
while ((line = br.readLine()) != null) {
if (line != null) {
list.add(line);
} catch (IOException e) {
e.printStackTrace();
} finally {
//释放资源
inputStream.close();
br.close();
} catch (IOException e) {
e.printStackTrace();
再整个方法测试下：
import java.util.L
public class TestMain {
public static void main(String[] args) {
CommandUtil util = new CommandUtil();
util.executeCommand("c:\\test.bat");
printList(util.getStdoutList());
System.out.println("--------------------");
printList(util.getErroroutList());
public static void printList(List&String& list){
for (String string : list) {
System.out.println(string);
这样一来，问题确实解决了，再也不会出现阻塞了~
阅读(...) 评论()使用JAVA调用SHELL命令的一个严重问题
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使用JAVA调用SHELL命令的一个严重问题
[问题点数：40分，结帖人Leoly003]
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本帖子已过去太久远了，不再提供回复功能。最近一周左右，网管监控系统经常监控到tomcat异常退出，由于有检测tomcat pid的脚本，所以会自动重启服务器，查询tomcat日志没有报错信息，查询系统message日志，可以看到如下信息。Dec 15 22:08:07 net-wap3 kernel: java[8299]: segfault at caa98 rip 00002aaac4d055bd rsp caa80 error 6然后用nohup strace -p pid && strace.log &将程序与内核之间传递的信号记录下来，记录下如下信息：Process 9754 attached - interrupt to quitfutex(0x40b589d0, FUTEX_WAIT, 9762, NULL &unfinished ...&+++ killed by SIGSEGV +++可以看到是被11号信号kill的，然后我们需要得到程序退出时的corefile。编辑/etc/profile将其中的ulimit -S -c 0 & /dev/null 2&&1改成ulimit -S -c unlimited & /dev/null 2&&1，然后source /etc/profile，用ulimit -c查看查看，将程序重启。然后查看一下重启后的程序的pid，然后cat /proc/pid/limits，其中Limit & & & & & & & & & & &Soft Limit & & & Hard Limit & & & & Units&Max core file size & & unlimited & & & & unlimited & & & & &bytes确定红色地方为unlimited，确保可以输出corefile，然后运行echo "/corefile/core_%p_%s_%t_%e" &&/proc/sys/kernel/core_uses_pid，将corefile输出到/corefile下，%p代表pid，%s代表引起程序退出的信号，%t代表自日0时到程序退出时的秒数，%e代表可执行文件名，如我得到的文件core_7033918_java。然后用gdb java&core_7033918_java和jstack java&core_7033918_java分析。在jstack输出的结果中发现如下信息- org.apache.jsp._480.mfb.zt.qc._.index_jsp._jspService(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=1680, line=296 (Interpreted frame)- org.apache.jasper.runtime.HttpJspBase.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=3, line=70 (Interpreted frame)- javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=30, line=717 (Compiled frame)- org.apache.jasper.servlet.JspServletWrapper.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, boolean) @bci=320, line=377 (Compiled frame)- org.apache.jasper.servlet.JspServlet.serviceJspFile(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.String, java.lang.Throwable, boolean) @bci=126, line=313 (Compiled frame)- org.apache.jasper.servlet.JspServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=347, line=260 (Compiled frame)- javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=30, line=717 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=376, line=290 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=101, line=206 (Compiled frame)- com.wondertek.mobiletv.portal.webapp.filter.XSSServletFilter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain) @bci=17, line=59 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=119, line=235 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=101, line=206 (Compiled frame)- org.apache.catalina.core.ApplicationDispatcher.invoke(javax.servlet.ServletRequest, javax.servlet.ServletResponse, org.apache.catalina.core.ApplicationDispatcher$State) @bci=393, line=646 (Compiled frame)- org.apache.catalina.core.ApplicationDispatcher.doInclude(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=260, line=551 (Compiled frame)- org.apache.catalina.core.ApplicationDispatcher.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=55, line=488 (Compiled frame)- sun.reflect.GeneratedMethodAccessor307.invoke(java.lang.Object, java.lang.Object[]) @bci=48 (Compiled frame)- sun.reflect.DelegatingMethodAccessorImpl.invoke(java.lang.Object, java.lang.Object[]) @bci=6, line=25 (Compiled frame)- java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) @bci=161, line=597 (Compiled frame)- net.bull.javamelody.JspWrapper.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[]) @bci=85, line=151 (Compiled frame)- net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[]) @bci=7, line=282 (Compiled frame)- $Proxy47.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=20 (Compiled frame)- org.apache.jasper.runtime.JspRuntimeLibrary.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse, java.lang.String, javax.servlet.jsp.JspWriter, boolean) @bci=45, line=968 (Interpreted frame)- org.apache.jsp._480.mfb.zt.qc._.index_jsp._jspService(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=1695, line=299 (Interpreted frame)- org.apache.jasper.runtime.HttpJspBase.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=3, line=70 (Interpreted frame)- javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=30, line=717 (Compiled frame)- org.apache.jasper.servlet.JspServletWrapper.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, boolean) @bci=320, line=377 (Compiled frame)- org.apache.jasper.servlet.JspServlet.serviceJspFile(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.String, java.lang.Throwable, boolean) @bci=126, line=313 (Compiled frame)- org.apache.jasper.servlet.JspServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=347, line=260 (Compiled frame)- javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=30, line=717 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=376, line=290 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=101, line=206 (Compiled frame)- com.wondertek.mobiletv.portal.webapp.filter.XSSServletFilter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain) @bci=17, line=59 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=119, line=235 (Compiled frame)- org.apache.catalina.core.ApplicationFilterChain.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=101, line=206 (Compiled frame)- org.apache.catalina.core.ApplicationDispatcher.invoke(javax.servlet.ServletRequest, javax.servlet.ServletResponse, org.apache.catalina.core.ApplicationDispatcher$State) @bci=393, line=646 (Compiled frame)- org.apache.catalina.core.ApplicationDispatcher.doInclude(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=260, line=551 (Compiled frame)- org.apache.catalina.core.ApplicationDispatcher.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=55, line=488 (Compiled frame)- sun.reflect.GeneratedMethodAccessor307.invoke(java.lang.Object, java.lang.Object[]) @bci=48 (Compiled frame)- sun.reflect.DelegatingMethodAccessorImpl.invoke(java.lang.Object, java.lang.Object[]) @bci=6, line=25 (Compiled frame)- java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) @bci=161, line=597 (Compiled frame)- net.bull.javamelody.JspWrapper.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[]) @bci=85, line=151 (Compiled frame)- net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[]) @bci=7, line=282 (Compiled frame)- $Proxy47.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=20 (Compiled frame)- org.apache.jasper.runtime.JspRuntimeLibrary.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse, java.lang.String, javax.servlet.jsp.JspWriter, boolean) @bci=45, line=968 (Interpreted frame)- org.apache.jsp._480.mfb.zt.qc._.index_jsp._jspService(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=1695, line=299 (Interpreted frame)- org.apache.jasper.runtime.HttpJspBase.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=3, line=70 (Interpreted frame)- javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=30, line=717 (Compiled frame)- org.apache.jasper.servlet.JspServletWrapper.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, boolean) @bci=320, line=377 (Compiled frame)- org.apache.jasper.servlet.JspServlet.serviceJspFile(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.String, java.lang.Throwable, boolean) @bci=126, line=313 (Compiled frame)- org.apache.jasper.servlet.JspServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) @bci=347, line=260 (Compiled frame)- javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) @bci=30, line=717 (Compiled frame)&发现程序异常是由于上面的页面中存在循环导致，至此故障恢复。<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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