list父子节点转树json

[{"title":"（ 7 个子文件 375KB ） list父子节点转树json","children":[{"title":"list父子节点转json","children":[{"title":"图片","children":[{"title":"list参数包含多个父子节点05-30_17-35-50.png <span style='color:#111;'> 24.61KB </span>","children":null,"spread":false},{"title":"输出json参数父子节点已经排列完成05-30_17-37-15.png <span style='color:#111;'> 27.66KB </span>","children":null,"spread":false}],"spread":true},{"title":"需要的jar包","children":[{"title":"fastjson-1.1.39.jar <span style='color:#111;'> 349.41KB </span>","children":null,"spread":false}],"spread":true},{"title":"代码","children":[{"title":"EnterpriseLoginController.java <span style='color:#111;'> 788B </span>","children":null,"spread":false},{"title":"City.java <span style='color:#111;'> 1.43KB </span>","children":null,"spread":false},{"title":"CityTest.java <span style='color:#111;'> 2.42KB </span>","children":null,"spread":false}],"spread":true},{"title":"帮助.txt <span style='color:#111;'> 261B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]