一、导入文件夹位置不同，但项目名称相同（项目名称在.project文件中可以看到）
原因：备份的文件夹名称被修改
办法1：修改已存在项目名称后再导入（最简单有效的办法）
a. 右击已经存在的同名项目，重命名
b.再导入工程
办法2：让项目名称不同
a.修改要被导入的文件夹名称
b.同时修改被导入文件夹下的.project文件内容第三行，如下图中将8048_sample改成与文件夹名一致
c.导入
办法3：彻底删除原项目（注意：删除后不可恢复，谨慎使用）
菜单
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- 前言
- 第五章 配方功能
- 第七章 定时任务
- 第九章 用户权限