Java 开发中的远程调试
进行远程调试简单来说：只需要在java 命令后面添加上如下的参数：
-Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=y
例如：原先是这样启动程序的
java -cp . HelloWorld，
现在就改成这样了
java -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=y -cp . HelloWorld
然后一运行就会出现如下的文字：
Listening for transport dt_socket at address: 8000
这就OK了。打开 Eclipse， 在调试里面新增一个 Remote Java Application，Host 填写上启动 Java 程序的那台服务器的地址，Port填写 8000，也就是参数中 address 后面指定的数字。剩下就跟平常一样了，断点该设就设，程序动态运行时也可以修改，不用重新拷贝，立刻生效，跟本地运行一样。当然了并不是所有的修改都可以立即生效的，有时还是需要我们把程序重新拷贝一下。
上面各个参数的含义分别是：transport=dt_socket指明了使用网络来传输，所有的平台都支持，server=y指明了启动VM的以调试服务器来执行，address=8000就是端口了，也能指定服务器IP，suspend=y则指定了VM开始的时候暂停，等待与客户端连接，连接上以后才继续执行。
更详细的内容看BEA上的《充分利用 J2EE 调试工具》一文
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