前台用ext,后台用java如果解析json格式的数据和读取json格式的数据库，然后存入数据库。

前台用ext,后台用java如果解析json格式的数据和读取json格式的数据库，然后存入数据库。

比较浅显的“对象数据库”，但查询时可能不太方便

不知道你们在说什么啊

比如数据为：
{ results:[{"UserID":"1","UserName":"韩山","UserPassword":"fdas","DisKindId":"双色"},{"UserID":"2"

,"UserName":"吴作三","UserPassword":"fdsd664uuogg","DisKindId":"液晶"},{"UserID":"10","UserName":"王琳","UserPassword"

:"dfsadfs","DisKindId":"普通CRT"},...]
把他们插入数据库user表：
name,password,display这3个字段中

怎么办呢，是不是引入什么json-lib.jar呀

怎么办呢，是不是引入什么json-lib.jar呀

可以试试Project Zero 的Resource Model.它可以将数据库的数据以REST的方式暴露出来，提供Json，Atom的数据格式。并且通过GET,PUT,DELETE,POST来对数据库进行CRUD操作。
你可以定义一个表employee：

{
    "fields" : {
          "firstname":{"type":"string"},
          "lastname":{"type":"string"},
          "location":{"type":"string", "options":["RTP","Beijing","Hursley","SVL"]},
          "phonenumber":{"type":"string"}
    }

}

然后你就可以通过REST的接口来访问它了：
获取表格的所有数据：http://localhost:8080/resources/employees

[
   {
      "firstname": "Jerry",
      "lastname": "Cuomo",
      "location": "North",
      "phonenumber": "1-XXX-XXX-XXXX",
      "id": 1,
      "updated": "2008-04-18 12:01:55"
   },
   {
      "firstname": "Jason",
      "lastname": "McGee",
      "location": "East",
      "phonenumber": "1-XXX-XXX-XXXX",
      "id": 2,
      "updated": "2008-04-18 12:01:56"
   }
]

获取某个record的数据：http://localhost:8080/resources/employees/1

{
   "firstname": "Jerry",
   "lastname": "Cuomo",
   "location": "North",
   "phonenumber": "1-XXX-XXX-XXXX",
   "id": 1,
   "updated": "2008-04-18 12:01:55"
}

查询：http://localhost:8080/resources/employees?firstname__startswith=Jer

[
   {
      "firstname": "Jerry",
      "lastname": "Cuomo",
      "location": "North",
      "phonenumber": "1-XXX-XXX-XXXX",
      "id": 1,
      "updated": "2008-04-18 12:01:55"
   }
]

Links:
Projectzero
Projectzero Resource Model 文档
Resource Model Test Case