Eclipse doesn't remember source lookup path,走断点时显示source not found

1.问题：For some reason Eclipse doesn't remember source lookup path for some java projects, and every time during debugging (after redeploying) I need to press "Edit source lookup path" button and add current project to the list.

解决：Window---->perferences----->Tomcat------>South Path----->勾选最上面的复选框，为Tomcat自动添加项目路径（缺点：不能同时起两个项目走断点，否则会自动添加South Path中最上面的项目，导致断点运行在不正确的项目上）