Spring Boot-pagehelper

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pagehelper-spring-boot-starter ：基于Mybatis 的分页插件。
支持物理分页的数据库:Oracle、Mysql、MariaDB、SQLite、Hsqldb、PostgreSQL、DB2、SqlServer(2005+)、Informix、H2。

---

实例：
1、pom.xml:

<dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.1.2</version>
</dependency>

2、Using
mybatis-config.xml

<plugin interceptor="com.github.pagehelper.PageInterceptor">
        <property name="helperDialect" value="mysql"/>
</plugin>

Spring application.xml

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="plugins">
    <array>
      <bean class="com.github.pagehelper.PageInterceptor">
        <property name="properties">
          <value>param1=value1</value>
        </property>
      </bean>
    </array>
  </property>
</bean>

application.properties

pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql

PageHelper Parameters:
helperDialect：oracle, mysql, mariadb, sqlserver, informix, h2, sqlserver2012...
offsetAsPageNum：Default value is false，When true, the offset parameter in RowBounds is used aspageNum.
rowBoundsWithCount：Default value is false, When true, PageHelper will execute count query.
pageSizeZero：Default value is false, When true, if pageSize=0 or RowBounds.Limit = 0 will query all the results .
reasonable：Default value is false， When true,pageNum <= 0 will query the first page, PageNum> pages will query the last page.
params：In support of startPage(Object params) method.
Default value is pageNum=pageNum;pageSize=pageSize;count=countSql;reasonable=reasonable;pageSizeZero=pageSizeZero.
supportMethodsArguments：the default value is 'false'#支持通过映射接口参数传递参数的页面.
autoRuntimeDialect：Default value is false.
closeConn：Default value is true

3、code:

//1. use by RowBounds
List<Country> list = sqlSession.selectList("x.y.selectIf", null, new RowBounds(0, 10));
//or interface
List<Country> list = countryMapper.selectIf(1, new RowBounds(0, 10));
//or PageRowBounds
PageRowBounds rowBounds = new PageRowBounds(0, 10);
List<Country> list = countryMapper.selectIf(1, new RowBounds(0, 10));
long total = rowBounds.getTotal();

//2. use static method startPage
PageHelper.startPage(1, 10);
List<Country> list = countryMapper.selectIf(1);

//3. use static method offsetPage
PageHelper.offsetPage(1, 10);
List<Country> list = countryMapper.selectIf(1);

//4. method parameters
public interface CountryMapper {
    List<Country> selectByPageNumSize(
            @Param("user") User user,
            @Param("pageNum") int pageNum, 
            @Param("pageSize") int pageSize);
}
//config supportMethodsArguments=true
List<Country> list = countryMapper.selectByPageNumSize(user, 1, 10);

//5. POJO parameters
public class User {
    //other fields
    //The following two parameters must be the same name as the params parameter
    private Integer pageNum;
    private Integer pageSize;
}
public interface CountryMapper {
    List<Country> selectByPageNumSize(User user);
}
//When the pageNum! = null && pageSize! = null in the user instance, this method will be automatically pagination
List<Country> list = countryMapper.selectByPageNumSize(user);

//6. ISelect interface
//jdk6,7 anonymous class, return Page
Page<Country> page = PageHelper.startPage(1, 10).doSelectPage(new ISelect() {
    @Override
    public void doSelect() {
        countryMapper.selectGroupBy();
    }
});
//jdk8 lambda
Page<Country> page = PageHelper.startPage(1, 10).doSelectPage(()-> countryMapper.selectGroupBy());

//return PageInfo
pageInfo = PageHelper.startPage(1, 10).doSelectPageInfo(new ISelect() {
    @Override
    public void doSelect() {
        countryMapper.selectGroupBy();
    }
});
//in lambda
pageInfo = PageHelper.startPage(1, 10).doSelectPageInfo(() -> countryMapper.selectGroupBy());

//do count only
long total = PageHelper.count(new ISelect() {
    @Override
    public void doSelect() {
        countryMapper.selectLike(country);
    }
});
//lambda
total = PageHelper.count(()->countryMapper.selectLike(country));