select * from user where id>0 limit 0,10

public class RowBounds {
? /* 默認(rèn)offset是0**/
? public static final int NO_ROW_OFFSET = 0;
? /* 默認(rèn)Limit是int的最大值，因此它使用的是邏輯分頁**/
? public static final int NO_ROW_LIMIT = Integer.MAX_VALUE;
? public static final RowBounds DEFAULT = new RowBounds();

? private int offset;
? private int limit;

? public RowBounds() {
? ? this.offset = NO_ROW_OFFSET;
? ? this.limit = NO_ROW_LIMIT;
? }

? public RowBounds(int offset, int limit) {
? ? this.offset = offset;
? ? this.limit = limit;
? }

? public int getOffset() {
? ? return offset;
? }

? public int getLimit() {
? ? return limit;
? }

}

private void handleRowValuesForSimpleResultMap(ResultSetWrapper rsw, ResultMap resultMap, ResultHandler<?> resultHandler, RowBounds rowBounds, ResultMapping parentMapping)
? ? ? throws SQLException {
? DefaultResultContext<Object> resultContext = new DefaultResultContext<Object>();
//跳過RowBounds設(shè)置的offset值
? ?skipRows(rsw.getResultSet(), rowBounds);
//判斷數(shù)據(jù)是否小于limit，如果小于limit的話就不斷的循環(huán)取值
? ?while (shouldProcessMoreRows(resultContext, rowBounds) && rsw.getResultSet().next()) {
? ? ?ResultMap discriminatedResultMap = resolveDiscriminatedResultMap(rsw.getResultSet(), resultMap, null);
? ? ?Object rowValue = getRowValue(rsw, discriminatedResultMap);
? ? ?storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
? ?}
}

private boolean shouldProcessMoreRows(ResultContext<?> context, RowBounds rowBounds) throws SQLException {
?? ?//判斷數(shù)據(jù)是否小于limit，小于返回true
? ? return !context.isStopped() && context.getResultCount() < rowBounds.getLimit();
}

? //跳過不需要的行,應(yīng)該就是rowbounds設(shè)置的limit和offset
? private void skipRows(ResultSet rs, RowBounds rowBounds) throws SQLException {
? ? if (rs.getType() != ResultSet.TYPE_FORWARD_ONLY) {
? ? ? if (rowBounds.getOffset() != RowBounds.NO_ROW_OFFSET) {
? ? ? ? rs.absolute(rowBounds.getOffset());
? ? ? }
? ? } else {
?? ? ?//跳過RowBounds中設(shè)置的offset條數(shù)據(jù)，只能逐條滾動(dòng)到指定位置
? ? ? for (int i = 0; i < rowBounds.getOffset(); i++) {
? ? ? ? rs.next();
? ? ? }
? ? }
}

<dependency>
?? ?<groupId>org.mybatis</groupId>
?? ?<artifactId>mybatis</artifactId>
?? ?<version>3.5.6</version>
</dependency>

import org.apache.ibatis.session.RowBounds;

public class UserServiceImpl implements UserService {
?? ?@Autowired
? ? private UserDao userDao;
? ??
? ? @Override
? ? public Map<String, Object> queryUserList(String currentPage, String pageSize) {
? ? ? ? //查詢數(shù)據(jù)總條數(shù)
? ? ? ? int total = userDao.queryCountUser();
? ? ? ? //返回結(jié)果集
? ? ? ? Map<String,Object> resultMap = new HashMap<String,Object>();
? ? ? ??
? ? ? ? resultMap.put("total", total);
? ? ? ? //總頁數(shù)
? ? ? ? int totalpage = (total + Integer.parseInt(pageSize) - 1) / Integer.parseInt(pageSize);
? ? ? ? resultMap.put("totalpage", totalpage);
? ? ? ??
? ? ? ? //數(shù)據(jù)的起始行
? ? ? ? int offset = (Integer.parseInt(currentPage)-1)*Integer.parseInt(pageSize);
? ? ? ? RowBounds rowbounds = new RowBounds(offset, Integer.parseInt(pageSize));
? ? ? ? //用戶數(shù)據(jù)集合
? ? ? ? List<Map<String, Object>> userList = userDao.queryUserList(rowbounds);
? ? ? ??
? ? ? ? resultMap.put("userList", userList);
? ? ? ??
? ? ? ? return resultMap;
? ? }

}

import org.apache.ibatis.session.RowBounds;

public interface UserDao {
? ??
? ? public int queryCountUser(); ? ? ? //查詢用戶總數(shù)
? ? public List<Map<String, Object>> queryUserList(RowBounds rowbounds); ? ?//查詢用戶列表
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.test.mapper.UserDao">
? ??
? ? <!-- 查詢用戶總數(shù) -->
? ? <select id="queryCountUser" resultType="java.lang.Integer">
? ? ? ? select count(1) from user
? ? </select>
? ??
? ? <!-- 查詢用戶列表 -->
? ? <select id="queryUserList" resultType="java.util.Map">
? ? ? ? select * from user
? ? </select>
? ??
</mapper>

select * from user where id >0 limit 3,10