Java 8 stream的详细用法 https://blog.csdn.net/y_k_y/article/details/84633001?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-1&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-1 每一个颓废的日子都是对青春的辜负