springboot + mybatis + mybatis use pagination pagination plug-in plug-ins use of PageHelper

mybatis use pagination plug PageHelper

The first step: introducing rely PageHelper in pom.xml

<!--分页插件-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>

Step Two: Configure PageHelper pagination plug-in application.yml file

#分页插件
pagehelper:
  helperDialect: mysql
  reasonable: true
  supportMethodsArguments: true
  params: count=countSql

Entity class pagination plug-in: Step

Current page
 Private  int pageNum; 
page number 
Private  int pageSize; 
the current number of pages 
Private  int size;
 // Since startRow and endRow not common here that a specific usage  
 // can "show startRow to endRow total size in the page pieces of data "   

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

first 
Private  int firstPage; 
Previous
Private  int prePage; 

if the first page 
Private  boolean isFirstPage = false ; 
whether the last page of the 
Private  boolean isLastPage = false ; 
whether there are previous 
Private  boolean hasPreviousPage = false ; 
if there is a next 
Private  boolean hasNextPage = false ; 
navigation page number of 
Private  int navigatePages; 
all navigation page number 
Private  int [] navigatepageNums;

Step four: the use of the service layer

/**
     * 分类博客分页显示
     * @param pageNum
     * @param pageSize
     * @param type
     * @return
     */
    @Override
    public Object pageBlogType(int pageNum, int pageSize, String type) {
        PageHelper.startPage(pageNum, pageSize);
        List<Blogs> blogs = blogDao.searchTypeblog(type);
        PageInfo<Blogs> page = new PageInfo<>(blogs);
        return page;
    }

Code layer dao

// According to the classification queries blog 
    List <Blogs> searchTypeblog (@Param ( "type") String type);