之前写过一篇JSP+Servlet+javabean+mysql实现页面多条件模糊查询 使用的是mysql进行的分页查询,mysql用limit控制,而oracle则是用rownum,今天第一次写oracle,查了一下资料试了一下,把代码帖出来

oracle的数据源配置也不同:

driverName=oracle.jdbc.driver.OracleDriver
url=jdbc\:oracle\:thin\:@127.0.0.1\:1521\:orcl
username=marketManager
pwd=marketManager

直接帖实现类(特别注意红色代码体):

package pb.market.com.cn.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List; import pb.market.com.cn.dao.ProviderDao;
import pb.market.com.cn.pojo.Provider;
import pb.market.com.cn.util.BaseDao; public class ProviderDaoImpl extends BaseDao implements ProviderDao { //获取供应商列表
public List<Provider> getProviderList(int pageNo, int pageSize, String where) {
List<Provider> providerList =new ArrayList<Provider>();
String sql="select * from ( select rownum as r,a.* from gongyingshang a where "+where+" rownum<=? ) where r>?";
Object[] params ={pageSize*pageNo,(pageNo-1)*pageSize};
if(this.getConnection()){
System.out.println(sql);
ResultSet rs = this.executeQuery(sql, params);
try {
while(rs.next()){
Provider provider = new Provider();
provider.setId(rs.getInt("id"));
provider.setGysno(rs.getInt("gysno"));
provider.setGysname(rs.getString("gysname"));
provider.setGystel(rs.getString("gystel"));
provider.setGysfax(rs.getString("gysfax"));
provider.setCreatedate(rs.getTimestamp("createdate"));
provider.setCreateby(rs.getString("createby"));
provider.setModifydate(rs.getTimestamp("modifydate"));
provider.setModifyby(rs.getString("modifyby"));
providerList.add(provider); }
} catch (SQLException e) {
e.printStackTrace();
}finally{
this.closeConnection();
}
}
return providerList;
}
/*public static void main(String[] args) { ProviderDao dd=new ProviderDaoImpl();
String where="金";
String where1="gysname like '%"+where+"%' and";
List<Provider> providerList =dd.getProviderList(1, 5, where1); for (Provider provider : providerList) {
System.out.println("11111111111111");
System.out.println(provider.getId());
} }*/ //获取供应商总数量
public int getProviderCount(String where) {
int count=0;
String sql="select count(*)as count from gongyingshang "+where;
Object[] params={};
if(this.getConnection()){
ResultSet rs =this.executeQuery(sql, params);
try {
if(rs.next()){
count = rs.getInt("count");
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
this.closeConnection();
}
}
return count;
}
}

中间的service实现类,我的业务较简单,service层基本不做什么,只是调用一下dao层实现类的方法而已:

package pb.market.com.cn.service.impl;

import java.util.List;

import pb.market.com.cn.dao.ProviderDao;
import pb.market.com.cn.dao.impl.ProviderDaoImpl;
import pb.market.com.cn.pojo.Provider;
import pb.market.com.cn.service.ProviderService; public class ProviderServiceImpl implements ProviderService {
private ProviderDao providerDao;
public ProviderServiceImpl(){
providerDao=new ProviderDaoImpl();
}
public List<Provider> getProviderList(int pageNo, int pageSize, String where) {
return providerDao.getProviderList(pageNo, pageSize, where);
}
public int getProviderCount(String where) {
return providerDao.getProviderCount(where);
} }

servlet:

package pb.market.com.cn.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import pb.market.com.cn.pojo.Provider;
import pb.market.com.cn.service.ProviderService;
import pb.market.com.cn.service.impl.ProviderServiceImpl; public class ProviderListServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
ProviderService providerService =new ProviderServiceImpl();
StringBuffer sb =new StringBuffer(1024);
StringBuffer sb1 =new StringBuffer(1024);
//获取模糊查询的值
String where = request.getParameter("proName");
//System.out.println("where================="+where);
//如果为空
if(where!=null && !"".equals(where)){
sb.append("where gysname like '%"+where+"%'");
sb1.append("gysname like '%"+where+"%' and");
}
//设置每页显示3条
int pageSize=3;
//得总条数
int totalCount =providerService.getProviderCount(sb.toString()); //得到总页数,如果总页数对一页的量取模==0,则。。。
int totalPageCount=0;
if((totalCount%pageSize)==0){
totalPageCount=totalCount/pageSize;
}else{
totalPageCount=totalCount/pageSize +1;
}
//获取当前页,默认一打开进来即是第1页
String pageIndex = request.getParameter("pageIndex");
//System.out.println("pageIndex==============="+pageIndex);
int currentPageNo=0;
if(pageIndex==null){
currentPageNo=1;
}else{
//System.out.println("这里怎么可能进得来???????????");
currentPageNo= Integer.parseInt(pageIndex);
} // 首页和尾页的异常控制
if (currentPageNo <= 0) {
currentPageNo = 1;
} else if (currentPageNo > totalPageCount) {
currentPageNo = totalPageCount;
}
//把各个页码传给JSp
request.setAttribute("pageSize", pageSize);
request.setAttribute("totalCount", totalCount);
request.setAttribute("totalPageCount", totalPageCount);
request.setAttribute("currentPageNo", currentPageNo);
//获取providerList
List<Provider> providerList = providerService.getProviderList(currentPageNo, pageSize, sb1.toString());
request.setAttribute("providerList", providerList);
request.getRequestDispatcher("/jsp/providerList.jsp").forward(request, response); }catch(Exception e){
e.printStackTrace();
} } public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response); } }

后面的JSP页面我就省略不写了。。。。。跟文头说的那篇mysql流程是一样,写法也类似