一、mapper

    <select id="selectCountry3" resultType="cn.edu.tju.domain.Country" >select  * from country</select>

二、接口：

    List<Country> selectCountry3(RowBounds rowBounds);

三、插件定义：

package cn.edu.tju.config;import org.apache.ibatis.cache.CacheKey;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.plugin.*;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;import java.util.Properties;@Intercepts({@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class}),@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class, CacheKey.class, BoundSql.class})})
public class MyPageInterceptor implements Interceptor {@Overridepublic Object intercept(Invocation invocation) throws Throwable {Object[] args = invocation.getArgs();MappedStatement ms = (MappedStatement) args[0];BoundSql boundSql = ms.getBoundSql(args[1]);RowBounds rowBounds = (RowBounds) args[2];String sql = boundSql.getSql();sql += " limit ";int offset = rowBounds.getOffset();int limit = rowBounds.getLimit();sql += (offset-1)*limit;sql += ",";sql += limit;System.out.println(sql);BoundSql newBoundSql = new BoundSql(ms.getConfiguration(), sql,boundSql.getParameterMappings(), boundSql.getParameterObject());Executor executor = (Executor) invocation.getTarget();return executor.query(ms, args[1], (RowBounds) args[2], (ResultHandler) args[3], null, newBoundSql);}@Overridepublic Object plugin(Object target) {return Plugin.wrap(target,this);}@Overridepublic void setProperties(Properties properties) {}
}

四、插件注册：

    <plugins>
<!--        <plugin interceptor="com.github.pagehelper.PageInterceptor"><property name="supportMethodsArguments" value="true"/></plugin>--><plugin interceptor="cn.edu.tju.config.MyPageInterceptor"></plugin></plugins>

五、查询：

package cn.edu.tju.test;import cn.edu.tju.domain.Country;
import cn.edu.tju.mapper.PersonMapper;
import com.github.pagehelper.PageHelper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;import java.io.IOException;
import java.util.List;public class MyBatisTest11 {public static void main(String[] args) throws IOException {SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(Resources.getResourceAsStream("mybatis-config.xml"));SqlSession sqlSession = sqlSessionFactory.openSession();List<Country> countries = sqlSession.getMapper(PersonMapper.class).selectCountry3(new RowBounds(1, 2));System.out.println(countries.size());System.out.println(countries);}
}