java远程调试

要想调试服务器上的java系统，须要加上一些启动参数：

eclipse中远程调试

-Xdebug

Enables debugging features.

-Xrunjdwp:<sub-options>

Loads the implementation of JDWP in the target VM. It uses a transport and the JDWP protocol to communicate with a separate debugger application. Specific suboptions are described below.

Starting from Java V5, you can use the -agentlib:jdwp option, instead of -Xdebug and -Xrunjdwp. But if you have to connect to the VM prior to V5, -Xdebug and -Xrunjdwp will be the only choice. Following are brief descriptions of the -Xrunjdwp suboptions.

transport：链接方式，经过socket方式，或者内存共享方式(限定windows)

Generally, socket transport is used. But shared-memory transport can also be used on the Windows platform, if available.

server：y表示被调试的服务器，n表示调试的客户端。

If the value is y, the target application listens for a debugger application to attach. Otherwise, it attaches to a debugger application at the specified address.

address：当server=y是，表示服务器监听的端口。当server=n时，表示本机是调试客户端，address表示远程的服务器地址:端口。

This is the transport address for the connection. If the server is n, attempt to attach to a debugger application at this address. Otherwise, listen for a connection at this port.

suspend：y表示调试客户端没链接上服务器就一直挂起。n则不受影响。

If the value is y, the target VM will be suspended until the debugger application connects.

例如：服务端

java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=n
-jar target/myproject-0.0.1-SNAPSHOT.jar

调试客户端：

在eclipse里面点击 Run > Debug Configurations, and double-click the Remote Java Application in the Eclipse menu. 指定项目源码、服务器ip和端口，点击右下角的debug，进入了调试模式。操做以下图：