1.修改java源代码后点击保存,IDE 自动编译并热部署,提示如下错误:
Errors occurred during the build.
Errors running builder 'DeploymentBuilder' on project '项目名'.
java.lang.NullPointerException
产生原因:
IDE勾选了自动编译部署,在部署调用时产生了异常。
解决办法:
取消myeclipse的自动部署:
右键点击项目 ->properties -> Builders ,将DeploymentBuilder勾选去除.
这样,系统将不会自动热部署,可点击工具栏的 Deploy Myeclipse j2ee ...进行手工部署.
此问题一般发生在Myeclipse 保存文件并自动部署时候。
Errors occurred during the build.
Errors running builder 'DeploymentBuilder' on project '项目名'.
java.lang.NullPointerException
有一种产生此错误的原因是因为此项目不不是由myeclipse创建的。
所以你需要检查.project 文件。
并且添加 <nature>com.genuitec.eclipse.j2eedt.core.webnature</nature>
2.
1、首先关闭MyEclipse工作空间。
2、然后删除工作空间下的
“/.metadata/.plugins/org.eclipse.core.runtime/.settings/com.genuitec.eclipse.ast.deploy.core.prefs”
这个文件。在这个文件中存储了一些部署项目的信息。删了这个部署的项目的信息就没有错误了。
3、重启启动MyEclipse即可解决了。
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