修改.project
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
<nature>org.eclipse.wst.common.modulecore.ModuleCoreNature</nature>
<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>
</natures>
拷贝.settings文件夹下的
org.eclipse.wst.common.component
org.eclipse.wst.common.project.facet.core.xml
并修改
org.eclipse.wst.common.component
<?xml version="1.0" encoding="UTF-8"?>
<project-modules id="moduleCoreId" project-version="2.0">
<wb-module deploy-name="ykb">
<property name="context-root" value="ykb"/>
<wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/resources"/>
<wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/java"/>
<wb-resource deploy-path="/" source-path="src/main/webapp"/>
</wb-module>
</project-modules>
然而gradle eclipse会有依赖包找不到的问题
参考 http://www.cnblogs.com/S-E-P/p/3227591.html
仍未解决
最终解答：
gradle plugin: use 'eclipse-wtp' rather than 'eclipse'
FUCK!
注意！以上仍未完全解决！
gradle识别web项目其实靠的是apply plugin: 'war'，若在根项目加war插件则所有项目都被识别成web项目，所以须在web项目的build.gradle中单独加入war！
FUCK!FUCK!FUCK!
