转到您的Java构建路径，项目标签下添加的lib，然后下订单和放大器;出口标签勾选你的lib，应用设置。
最后只是清理项目和lib，它应该正常工作...

Go to your java build path, under project tab add your lib and then under order & export tab tick your lib, apply settings. At last just clean the project and lib, it should work properly...