SSM framework three minutes to get paging query

Domestic use of third-party jar pagehelper

Basic attribute values ​​inside

 // this page 
    Private  int pageNum;
     // page number 
    Private  int pageSize;
     // number of the current page 
    Private  int size; 

    // Since startRow and endRow not common here that a specific usage
     // be in the page " startRow to display endRow total size of data " 

    // current page is the first element of a row number in the database 
    private  int startRow;
     // this last element in the page line number in the database 
    private  int endRow;
     // total number of records 
    private  Long total;
     // total number of pages 
    private  int pages;
     // result set 
    privateList <T> List; 

    // a former 
    Private  int prePage;
     // Next 
    Private  int nextPage; 

    // whether the first page of the 
    Private  boolean isFirstPage = false ;
     // whether the last page of the 
    Private  boolean isLastPage = false ;
     // Is there a previous page 
    Private  boolean hasPreviousPage = false ;
     // if there Next 
    Private  boolean hasNextPage = false ;
     // navigation page number 
    Private  intnavigatePages;
     // all navigation page number 
    Private  int [] navigatepageNums;
     // first page navigation bar 
    Private  int navigateFirstPage;
     // last page navigation bar 
    Private  int navigateLastPage;

View Code

1. Assign the objects to the container configuration file processing mybatis

  <! - put to the IOC Governing SqlSessionFactory -> 
    <bean the above mentioned id = "SqlSessionFactory" class = "org.mybatis.spring.SqlSessionFactoryBean"> 
        <Property name = "dataSource" ref = "dataSource" /> 
        <! - incoming PageHelper plug-in for paging query -> 
        <Property name = "plugins"> 
            <Array> 
                <-! plug incoming objects -> 
                <bean class = "com.github.pagehelper.PageInterceptor"> 
                    < name = Property "Properties"> 
                        <The props> 
                            <prop Key = "helperDialect"> Oracle </ prop>
                            <prop key="reasonable">true</prop>
                        </props>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

View Code

2. I am using jsp page where the page number of the parameters set about

<% - page = 1 & size = 4 paging query -%>

href="${pageContext.request.contextPath}/orders/findAll.do?page=1&size=4">

3. web layer process (partial code) to set a start your page, 4 page shows the number of passed as parameters to

 / * Name = Request parameter name (must be configured) 
    * = Required required, the default is true, i.e., the request must include the parameter, if it does not, an exception is thrown (optional) 
    Default parameters * defaultValue = 
     * * / 
    public ModelAndView the findAll (@RequestParam (name = "Page", required = to true , defaultValue = ". 1") int Page, @ RequestParam (name = "size", required = to true , defaultValue = ". 4") int size ) { 
        ModelAndView Music Videos = new new ModelAndView (); 
        List <the Orders> Orders = service.findAll (Page, size);
         // PageInfo tab is the bean 
        PageInfo PageInfo = new new PageInfo (Orders); 
        mv.addObject ("pageInfo",pageInfo);
        mv.setViewName("orders-page-list");
        return mv;
    }

View Code

4. Modify Data Frontend display page, because the data is encapsulated you query a list of objects pageInfo

<c:forEach items="${pageInfo.list}" var="orders">

 http://git.oschina.net/free/Mybatis_PageHelper jar Download