<分区>
当在下面的代码中重新抛出异常时，不会保留原始堆栈跟踪。
异常在第 148 行抛出并在第 150 行重新抛出。在重新抛出之后，第 150 行是指定的异常源。
我必须怎么做才能保留原始堆栈跟踪？
代码:
try {
content = (InputStream) conn.getContent(); //line 148
} catch (IOException e) {
throw new RuntimeException(e); //line 150
}
原始堆栈跟踪:
(java.lang.StackTraceElement[]) [sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source), java.net.URLConnection.getContent(Unknown Source), com.mycompany.myapp.client.services.impl.AbstractClientService.getResponseEle(AbstractClientService.java:148), com.mycompany.myapp.client.services.impl.AbstractClientService.getResponseEleWithCheck(AbstractClientService.java:162), com.mycompany.myapp.client.services.impl.AbstractClientService.getResponseEleWithCheck(AbstractClientService.java:158), com.mycompany.myapp.client.services.impl.InfoQueryClientServiceImpl.getFileOnTmpList(InfoQueryClientServiceImpl.java:84), com.mycompany.myapp.client.myappClient.getFileOnTmpList(myappClient.java:196), com.mycompany.myapp.client.model.Model.updateStudyInfos(Model.java:96), com.mycompany.myapp.client.model.Model.instantiateSingleton(Model.java:46), com.mycompany.myapp.applet.MainApplet.addMainPanel(MainApplet.java:106), com.mycompany.myapp.applet.MainApplet.createUIPanel(MainApplet.java:76), com.mycompany.myapp.applet.MainApplet.init(MainApplet.java:58), com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init(Unknown Source), sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source), java.lang.Thread.run(Unknown Source)]
重新抛出后的堆栈跟踪:
(java.lang.StackTraceElement[]) [com.mycompany.myapp.client.services.impl.AbstractClientService.getResponseEle(AbstractClientService.java:150), com.mycompany.myapp.client.services.impl.AbstractClientService.getResponseEleWithCheck(AbstractClientService.java:162), com.mycompany.myapp.client.services.impl.AbstractClientService.getResponseEleWithCheck(AbstractClientService.java:158), com.mycompany.myapp.client.services.impl.InfoQueryClientServiceImpl.getFileOnTmpList(InfoQueryClientServiceImpl.java:84), com.mycompany.myapp.client.myappClient.getFileOnTmpList(myappClient.java:196), com.mycompany.myapp.client.model.Model.updateStudyInfos(Model.java:96), com.mycompany.myapp.client.model.Model.instantiateSingleton(Model.java:46), com.mycompany.myapp.applet.MainApplet.addMainPanel(MainApplet.java:106), com.mycompany.myapp.applet.MainApplet.createUIPanel(MainApplet.java:76), com.mycompany.myapp.applet.MainApplet.init(MainApplet.java:58), com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init(Unknown Source), sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source), java.lang.Thread.run(Unknown Source)]