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1. 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！
2. 用easyui做的Java项目，新增二维码图片上传，然后存入项目指定的目录下。点击详情时怎样显示二维码图片？
3. 使用easyui做前台的 Java项目,在本地各浏览器上运行良好,但是部署到服务器上后,格式改变~
4. java 使用easyui 的弹出层

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. 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:. 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}
  ]
}

用easyui做的Java项目，新增二维码图片上传，然后存入项目指定的目录下。点击详情时怎样显示二维码图片？

看这里 我就用了这种方法，只要从数据库读取图片的路径就可以了

使用easyui做前台的 Java项目,在本地各浏览器上运行良好,但是部署到服务器上后,格式改变~

这不是兼容问题，你都说了，本地的各个浏览器运行正常。 看看对方检测的是用什么浏览器

java 使用easyui 的弹出层

easyui好久不用了，因为体验问题，已经基本上被淘汰了，你要想好好学，还是看下官网吧