UsersController.java
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package com.project.demo.web;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.project.demo.domain.DataTablePageUtil;
import com.project.demo.domain.Users;
import com.project.demo.service.UsersService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@Controller
@RequestMapping(value = "/users")
public class UsersController {
@Autowired
private UsersService usersService;
@RequestMapping(method = RequestMethod.GET)
public String findAll(){
return "/users/index";
}
@RequestMapping(value = "/usersList",method = RequestMethod.GET,produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public String usersList(final HttpSession session, final HttpServletRequest request){
final Map<String,Object> params = new HashMap<>();
DataTablePageUtil<Users> dataTable = new DataTablePageUtil<Users>(request);
System.out.print(request.toString());
System.out.println(dataTable.getPage_num()+"||"+dataTable.getPage_size());
PageHelper.startPage(dataTable.getPage_num(),dataTable.getPage_size());
// Integer limit = dataTable.getPage_size();
// Integer offset =( dataTable.getPage_num()-1)*limit;
// params.put("limit",limit);
// params.put("offset",offset);
// System.out.println(params.get("limit")+"|-------|"+params.get("offset"));
// PageHelper.startPage(dataTable.getPage_num(),dataTable.getPage_size());
final List<Users> usersList = usersService.search(params);
PageInfo<Users> pageInfo = new PageInfo<>(usersList,2);
System.out.println(pageInfo.toString());
//封装数据给DataTables
dataTable.setDraw(dataTable.getDraw());
dataTable.setData(pageInfo.getList());
dataTable.setRecordsTotal((int)pageInfo.getTotal());
dataTable.setRecordsFiltered(dataTable.getRecordsTotal());
//返回数据到页面
String jsonObject = JSONObject.toJSONString(dataTable);
pageInfo.setStartRow(1);
pageInfo.setEndRow(10);
return jsonObject;
}
}