实现文本排序的基本操作

[{"title":"（ 12 个子文件 12KB ） 实现文本排序的基本操作","children":[{"title":"listalign","children":[{"title":"listalign.pro.user <span style='color:#111;'> 18.15KB </span>","children":null,"spread":false},{"title":"images","children":[{"title":"right.png <span style='color:#111;'> 1.37KB </span>","children":null,"spread":false},{"title":"center.png <span style='color:#111;'> 1.37KB </span>","children":null,"spread":false},{"title":"justify.png <span style='color:#111;'> 1.32KB </span>","children":null,"spread":false},{"title":"undo.png <span style='color:#111;'> 1.71KB </span>","children":null,"spread":false},{"title":"redo.png <span style='color:#111;'> 1.71KB </span>","children":null,"spread":false},{"title":"left.png <span style='color:#111;'> 1.30KB </span>","children":null,"spread":false}],"spread":true},{"title":"listalign.pro <span style='color:#111;'> 110B </span>","children":null,"spread":false},{"title":"listalign.h <span style='color:#111;'> 523B </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 198B </span>","children":null,"spread":false},{"title":"listalign.qrc <span style='color:#111;'> 285B </span>","children":null,"spread":false},{"title":"listaligh.cpp <span style='color:#111;'> 4.18KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]