JAVA MyBybatis分页

java：

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Properties;

import org.apache.ibatis.executor.parameter.ParameterHandler;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.DefaultReflectorFactory;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.SystemMetaObject;
import org.imooc.bean.BaseBean;
import org.imooc.bean.Page;

@Intercepts({@Signature(type=StatementHandler.class,method="prepare",args={Connection.class})})
public class PageInterceptor implements Interceptor{

	public Object intercept(Invocation arg0) throws Throwable {
		StatementHandler statementHandler = (StatementHandler)arg0.getTarget();
		MetaObject metaObject = MetaObject.forObject(statementHandler, SystemMetaObject.DEFAULT_OBJECT_FACTORY, SystemMetaObject.DEFAULT_OBJECT_WRAPPER_FACTORY,new DefaultReflectorFactory());
		MappedStatement mappedStatement = (MappedStatement)metaObject.getValue("delegate.mappedStatement");
		String id = mappedStatement.getId();
		if(id.endsWith("ByPage")) {
			BoundSql boundSql = statementHandler.getBoundSql();
			String sql = boundSql.getSql();
			String countSql = "select count(*) from(" + sql + ")t";
			Connection conn = (Connection)arg0.getArgs()[0];
			PreparedStatement statement = conn.prepareStatement(countSql);
			ParameterHandler parameterHandler = (ParameterHandler)metaObject.getValue("delegate.parameterHandler");
			parameterHandler.setParameters(statement);
			ResultSet rs = statement.executeQuery();
			BaseBean bean = (BaseBean)boundSql.getParameterObject();
			Page page = bean.getPage();
			if(rs.next()) {
				page.setTotalNumber(rs.getInt(1));
			}
			String pageSql = sql + " limit " + (page.getCurrentPage() - 1) * page.getPageNumber() + "," + page.getPageNumber();
			metaObject.setValue("delegate.boundSql.sql", pageSql);
		}
		return arg0.proceed();
	}

	public Object plugin(Object arg0) {
		return Plugin.wrap(arg0, this);
	}

	public void setProperties(Properties arg0) {
		
	}
}

　　

/**
 * 分页对象
 */
public class Page {
	
	// 总条数
	private int totalNumber;
	// 当前页数
	private int currentPage;
	// 总页数
	private int totalPage;
	// 每页显示条数
	private int pageNumber;
	
	public Page() {
	    this.currentPage = 1;
	    this.pageNumber = 5;
	}

	public int getTotalNumber() {
		return totalNumber;
	}
	
	private void count() {
		this.totalPage = this.totalNumber / this.pageNumber;
		if(this.totalNumber % this.pageNumber > 0) {
			this.totalPage++;
		}
		if(this.totalPage <= 0) {
			this.totalPage = 1;
		}
		if(this.currentPage > this.totalPage) {
			this.currentPage = this.totalPage;
		}
		if(this.currentPage <= 0) {
			this.currentPage = 1;
		}
	}
	
	public void setTotalNumber(int totalNumber) {
		this.totalNumber = totalNumber;
		this.count();
	}
	
	public int getCurrentPage() {
		return currentPage;
	}
	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}
	public int getTotalPage() {
		
		return totalPage;
	}
	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}
	public int getPageNumber() {
		return pageNumber;
	}
	public void setPageNumber(int pageNumber) {
		this.pageNumber = pageNumber;
	}
}

　　

public class BaseBean {
	
	private Page page;
	
	public BaseBean() {
	    this.page = new Page();
	}
	
	public Page getPage() {
		return page;
	}
	public void setPage(Page page) {
		this.page = page;
	}
}

　　jsp页面：

<%@ tag language="java" pageEncoding="UTF-8" %>
<%@ attribute type="org.imooc.bean.Page" name="page" required="true" %>
<%@ attribute type="String" name="jsMethodName" required="true" %>

<script type="text/javascript">
	function transCurrentPage(currentPage) {
		var rule = /^[0-9]*[1-9][0-9]*$/;
		if(!rule.test(currentPage)) {
			currentPage = 1;
		}
		eval("${jsMethodName}(currentPage)");
	}
</script>

<div class="page fix">
	<a href="javascript:transCurrentPage('1');" class="first">首页</a>
	<a href="javascript:transCurrentPage('${page.currentPage - 1}');" class="pre">上一页</a>
	当前第<span>${page.currentPage}/${page.totalPage}</span>页
	<a href="javascript:transCurrentPage('${page.currentPage + 1}');" class="next">下一页</a>
	<a href="javascript:transCurrentPage('${page.totalPage}');" class="last">末页</a>
	跳至  <input id="currentPageText" value="1" class="allInput w28" type="text"/> 页  
	<a href="javascript:transCurrentPage($('#currentPageText').val());" class="go">GO</a>
</div>

　　调用：

<%@ taglib prefix="t" tagdir="/WEB-INF/tags"%>
<!-- 分页 -->
<t:page jsMethodName="search" page="${searchParam.page}"></t:page>