Java项目用easyui做树形列表后台代码怎么来准备数据啊？不要概括型答案，要详细过程的，谢谢！

Java项目用easyui做树形列表后台代码怎么来准备数据啊？不要概括型答案，要详细过程的，谢谢！

教你怎么解决,下次就知道了.

http://www.jeasyui.net/demo/581.html
访问这个地址,是easyui的官网范例,可以看到范例的html里面有这个配置treegrid_data3.json
所以官方的代码用的是这个地址返回的json:http://www.jeasyui.net/demo/treegrid_data3.json.
访问上面的地址,返回值就是你要的:
{"total":9,"rows":[
{"id":1,"region":"Wyoming"},
{"id":11,"region":"Albin","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":1},
{"id":12,"region":"Canon","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":1},
{"id":13,"region":"Egbert","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":1},
{"id":2,"region":"Washington"},
{"id":21,"region":"Bellingham","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2},
{"id":22,"region":"Chehalis","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2},
{"id":23,"region":"Ellensburg","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2},
{"id":24,"region":"Monroe","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2}
],"footer":[
{"region":"Total","f1":14000,"f2":12600,"f3":13321,"f4":15281,"f5":14931,"f6":13461,"f7":14126,"f8":12866}
]}追问我就是想知道后台Java代码怎么写追答取出你的数据之后,按照上面的格式拼接json.追问还是不明白