mybatis+oracle实现分页查询--非常简单实用

</pre>前几天刚学习了mybatis，之后就在我写的某个列子中加上一层mybatis来访问oracle数据库，一般的增删改查经过测试都没有问题，唯一留下oracle的分页查询，一开始自然而然的就想当然的把oracle分页查询语句写进userInfo.xml中<p></p><p></p><pre name="code" class="html"><select id="queryUserListForPage" parameterclass="Page" resultmap="UserInfoResult">select * from (select t.*, ROWNUM RM from (select * from tb_user_info) t where ROWNUM<=#max# ) where RM> #offset#</select>

但该xml文件会报语法错误，不信，运行果然出错了，尝试多种方法之后还是不行。最后想到了一种流氓的办法终于搞定了

废话不说 代码说话

userInfo.xml

<select id="queryUserListForPage" parameterClass="string" resultMap="UserInfoResult">
		$sql$
	</select>

package com.is.dao.ibatis.impl;

/**
 * Oracle分页查询语句生成类 为ibatis实现分页设计
 * 
 * @author qiulongjie
 * 
 */
public class PageInfo {
	private int offset;
	private int max;
	private String sql;

	public PageInfo() {
	}

	public PageInfo(int offset, int max) {
		this.offset = offset;
		this.max = max;
		this.sql = "select * from (select t.*, ROWNUM RM from (select * from tb_user_info) t where ROWNUM<=" + this.max
				+ " ) where RM> " + this.offset;
		System.out.println(sql);
	}

	public String getSql() {
		return sql;
	}

	public void setSql(String sql) {
		this.sql = sql;
	}

	public int getOffset() {
		return offset;
	}

	public void setOffset(int offset) {
		this.offset = offset;
	}

	public int getMax() {
		return max;
	}

	public void setMax(int max) {
		this.max = max;
	}

}

数据访问层的数据查询代码

public List<UserInfo> getUserInfoForPage(int offset, int max) {
		List<UserInfo> userInfos = new ArrayList<UserInfo>();
		try {
			userInfos = IbatisUtil.getSqlMapClient().queryForList("queryUserListForPage",
					new PageInfo(offset, max).getSql());
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return userInfos;
	}