一段時間沒部署web項目了，今天部署時突然報錯，遂看下怎么解決。

?java.lang.NullPointerExceptionat com.genuitec.eclipse.ast.deploy.core.Deployment.<init>(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.ModuleDeployment.<init>(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.WebDeployment.<init>(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.Deployment.create(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.loadFromPreferences(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.init(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.<init>(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.getDefault(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.ui.ServerTreeViewer$ServerTreeContentProvider.inputChanged(Unknown Source) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:276) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690) at com.genuitec.eclipse.ast.deploy.core.ui.ServerTreeViewer.<init>(Unknown Source) at com.genuitec.eclipse.ast.deploy.core.ui.ServerView.createPartControl(Unknown Source) at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:375) at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:229)

仔細看下控制臺，顯然有些之前的項目信息提示，應該是有殘存的項目找不著？

然后找到下面的文件，打開看信息有問題，果斷刪掉，重新打開MyEclipse。

總結

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