基于Struts2+Extjs3.0 实现简单分页

S1,首先要在GridPanel中添加PagingToolbar,它跟GridPanel只是包含的关系。本质上它们都共用一个JsonStore,从而产生联系

bbar: new Ext.PagingToolbar({   pageSize: 2,   store: check_list_store,   displayInfo: true,   beforePageText:"第 ",   afterPageText:" 页/共 {0} 页",   displayMsg: '显示从{0}条数据到{1}条数据，共{2}条数据',   emptyMsg: "没有数据"   })

S2,JsonStore一定要指定记录的总数目

var check_list_store = new Ext.data.JsonStore({     url: '<%=basePath%>check/check_list!list',   root: "rows",   totalProperty: 'totalCount',   idProperty: 'studentSubID',   remoteSort: true,   fields:["studentSubID",                  "studentNumber",    "projectName",    "taskName",    "studentName",    "submitFile",    "submitFileName",    {name:"submitDate"},    "submitPass","submitScore","submitForUS"]  });

S3,用Firebug查看,你会发现Extjs会自动向服务器POST两个参数,不错这两个参数就是表示显示当前第start条开始,当前页有limit条数据!所以我们只要在服务器端接收这两个数据,并且返回相应的JSON数据就可以了!

private Map session;  public Map getSession() {   return session;  }  public void setSession(Map session) {   this.session = session;  }  //分页  private String limit;  private String start;     public String getLimit() {   return limit;  }  public void setLimit(String limit) {   this.limit = limit;  }  public String getStart() {   return start;  }     public void setStart(String start) {   this.start = start;  }    private Map responseJson;  public Map getResponseJson() {   return responseJson;  }  public void setResponseJson(Map responseJson) {   this.responseJson = responseJson;  }    // SERVICE  public CheckPagingService checkPagingService;    public CheckPagingService getCheckPagingService() {   return checkPagingService;  }  @Resource(name = "checkPagingService")  public void setCheckPagingService(CheckPagingService checkPagingService) {   this.checkPagingService = checkPagingService;  }    // 返回JSON 用到的MAP LIST  Map<String, Object> map = new HashMap<String, Object>();  List<Map<String, Object>> list = new ArrayList<Map<String,Object>>();    public String list() throws Exception {   //通过教师  学生提交列表     String number = (String) getSession().get("number");   int count =checkPagingService.getCountOfStudentSubByTeacher(number);   List<studentsub>studentSubList=checkPagingService.getPagingStudentSubByTeacher(number  , getStart()==null?0:Integer.valueOf(getStart()), getLimit()==null?2:Integer.valueOf(getLimit()));   if (studentSubList != null) {    for (StudentSub ss : studentSubList) {     Map<string, object=""> m = new HashMap<string, object="">();     m.put("studentSubID", ss.getStudentSubID());     m.put("studentNumber", ss.getStudent().getNumber());     m.put("studentName", ss.getStudent().getStudentName());     m.put("projectName", ss.getTask().getProject().getProjectName());     m.put("taskName", ss.getTask().getTaskName());     m.put("submitFileName", ss.getFileName());     m.put("submitFile", ss.getFileSrc());     m.put("submitDate", ss.getSubDate());     // 是否审核 评分 ,被展示     m.put("submitPass", ss.getIsPass());     m.put("submitScore", String.valueOf(ss.getScore()));     m.put("submitForUS", ss.getIsForUS());     list.add(m);    }   }   map.put("totalCount",count);   map.put("rows", list);   this.setResponseJson(map);   return "list";  }

Service层

public List<StudentSub> getPagingStudentSubByTeacher(final String number,final int index, final int pageSize)throws Exception{   return getStudentSubDAO().getPagingStudentSubByTeacher(number, index, pageSize);  }

DAO层

public List<StudentSub> getPagingStudentSubByTeacher(final String number,final int index,   final int pageSize){   List resultList=this.getHibernateTemplate().executeFind(new HibernateCallback() {        public Object doInHibernate(Session s) throws HibernateException,SQLException {            Query q=s.createQuery("from StudentSub ss where ss.task.project.teacher  .number="+number+"order by ss.isPass asc");     q.setFirstResult(index);     q.setMaxResults(pageSize);     List list=q.list();     return list;    }   });   return resultList;  }