jsp+servlet实现模糊查询和分页效果
1.DAO+MVC包
2.DAO接口方法定义
package com.wanczy.dao;
import java.math.BigDecimal;
import java.util.List;
import com.wanczy.pojo.CustomerResourcePOJO;
public interface CustomerResourceDAO {
/**
*
* @param sName学校名称
* @param cLevel合作等级
* @param cState合作状态
* @param pageSize一页显示数据的笔数
* @param pageCurrent显示的页数
* @return
*/
//根据名字水平状态来查询数据，传入页数及当前页数
public List findByNameLevelState (String sName,int cLevel,int cState,int pageSize,int pageCurrent);
//查询数据笔数
public int findCountByNameLevelState(String sName,int cLevel,int cState);
//查询单笔数据
public CustomerResourcePOJO findByCId(BigDecimal cID);
//修改
public boolean doUpd(CustomerResourcePOJO pojo);
//新增
public boolean doIns(CustomerResourcePOJO pojo);
//删除
public boolean doDel(BigDecimal cID);
} 3.DAO接口方法实现方法
package com.wanczy.dao.impl;
import java.math.BigDecimal;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import com.wanczy.dao.CustomerResourceDAO;
import com.wanczy.pojo.CustomerResourcePOJO;
public class CustomerResourceDAOImpl implements CustomerResourceDAO {
Connection conn ;
public CustomerResourceDAOImpl(Connection conn){
this.conn = conn;
}
public boolean doDel(BigDecimal cID) {
boolean flag = false;
PreparedStatement pstate = null;
try {
this.conn.setAutoCommit(false);
String sql = "delete from customer_resource where c_id = ?";
pstate = this.conn.prepareStatement(sql);
pstate.setBigDecimal(1, cID);
pstate.execute();//执行
this.conn.commit();
flag = true;
} catch (Exception e) {
e.printStackTrace();
try {
this.conn.rollback();
} catch (Exception e2) {
e2.printStackTrace();
// TODO: handle exception
}
// TODO: handle exception
} finally{
try {
pstate.close();
} catch (Exception e2) {
e2.printStackTrace();
// TODO: handle exception
}
}
return flag;
}
public boolean doIns(CustomerResourcePOJO pojo) {
boolean flag = false;
PreparedStatement pstate = null;
try {
this.conn.setAutoCommit(false);
String sql = "insert into customer_resource (c_id, s_name, s_add, " +
"s_link_man, s_link_tel, c_level, c_state ,s_leader, s_leader_tel)" +
"values(scott_squence.nextval,?,?,?,?,?,?,?,?)";
pstate = this.conn.prepareStatement(sql);
pstate.setString(1,pojo.getSname());
pstate.setString(2,pojo.getSadd());
pstate.setString(3,pojo.getSlinkMan());
pstate.setString(4,pojo.getSlinkTel());
pstate.setInt(5,pojo.getClevel());
pstate.setInt(6,pojo.getCstate());
pstate.setString(7,pojo.getSleader());
pstate.setString(8,pojo.getSleaderTel());
pstate.execute();//执行
this.conn.commit();
flag = true;
} catch (Exception e) {
e.printStackTrace();
try {
this.conn.rollback();
} catch (Exception e2) {
e2.printStackTrace();
// TODO: handle exception
}
// TODO: handle exception
} finally{
try {
pstate.close();
} catch (Exception e2) {
e2.printStackTrace();
// TODO: handle exception
}
}
return flag;
}
public boolean doUpd(CustomerResourcePOJO pojo) {
boolean flag = false;
PreparedStatement pstate = null;
try {
this.conn.setAutoCommit(false);
String sql = "update customer_resource set s_name=?, s_add=?, " +
" s_link_man=?, s_link_tel=?, c_level=?, c_state=? ,s_leader=?, s_leader_tel=? where" +
" c_id = ?";
pstate = this.conn.prepareStatement(sql);
pstate.setString(1,pojo.getSname());
pstate.setString(2,pojo.getSadd());
pstate.setString(3,pojo.getSlinkMan());
pstate.setString(4,pojo.getSlinkTel());
pstate.setInt(5,pojo.getClevel());
pstate.setInt(6,pojo.getCstate());
pstate.setString(7,pojo.getSleader());
pstate.setString(8,pojo.getSleaderTel());
pstate.setBigDecimal(9, pojo.getCid());
pstate.execute();//执行
this.conn.commit();
flag = true;
} catch (Exception e) {
e.printStackTrace();
try {
this.conn.rollback();
} catch (Exception e2) {
e2.printStackTrace();
// TODO: handle exception
}
// TODO: handle exception
} finally{
try {
pstate.close();
} catch (Exception e2) {
e2.printStackTrace();
// TODO: handle exception
}
}
return flag;
}
public CustomerResourcePOJO findByCId(BigDecimal cID) {
CustomerResourcePOJO pojo = null;
PreparedStatement pstate = null;
ResultSet res = null;
try {
String sql = "select s_name, s_add, " +
"s_link_man, s_link_tel, c_level, c_state ,s_leader, s_leader_tel from customer_resource where c_id = ?";
pstate = this.conn.prepareStatement(sql);
pstate.setBigDecimal(1, cID);
res = pstate.executeQuery();
while(res.next()){
pojo = new CustomerResourcePOJO(cID,res.getString(1),res.getString(2),
res.getString(3),res.getString(4),res.getInt(5),res.getInt(6),
res.getString(7),res.getString(8));
}
} catch (Exception e) {
e.printStackTrace();
// TODO: handle exception
} finally{
try {
res.close();
pstate.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
return pojo;
}
public List findByNameLevelState(String sName,
int cLevel, int cState, int pageSize, int pageCurrent) {
List list = new ArrayList();
PreparedStatement pstate = null;
ResultSet res = null;
try {
StringBuffer sql = new StringBuffer();
sql.append("select c_id,s_name, s_add, s_link_man, "+
" s_link_tel, c_level, c_state ,s_leader, "+
" s_leader_tel from (select c_id,s_name, s_add, s_link_man, "+
" s_link_tel, c_level, c_state ,s_leader, "+
" s_leader_tel ,rownum abc "+
" from customer_resource where s_name like ? ");
if(cLevel != 0){
sql.append(" and c_level = "+cLevel);
}
if(cState != 0){
sql.append(" and c_state = "+cState);
}
sql.append(" ) where abc>? and abc<=? order by c_level,c_state");
pstate = this.conn.prepareStatement(sql.toString());
pstate.setString(1, "%"+sName+"%");
pstate.setInt(2, (pageCurrent-1)*pageSize);
pstate.setInt(3, pageCurrent*pageSize);
res = pstate.executeQuery();
while(res.next()){
CustomerResourcePOJO pojo = new CustomerResourcePOJO(res.getBigDecimal(1),res.getString(2),res.getString(3),
res.getString(4),res.getString(5),res.getInt(6),res.getInt(7),
res.getString(8),res.getString(9));
list.add(pojo);
}
} catch (Exception e) {
e.printStackTrace();
// TODO: handle exception
} finally{
try {
res.close();
pstate.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
return list;
}
//查询单笔数据
public int findCountByNameLevelState(String sName, int cLevel, int cState) {
int count = 0;
PreparedStatement pstate = null;
ResultSet res = null;
try {
StringBuffer sql = new StringBuffer();
sql.append("select count(c_id) from customer_resource where s_name like ? ");
if(cLevel != 0){
sql.append(" and c_level = "+cLevel);
}
if(cState != 0){
sql.append(" and c_state = "+cState);
}
pstate = this.conn.prepareStatement(sql.toString());
pstate.setString(1, "%"+sName+"%");
res = pstate.executeQuery();
while(res.next()){
count = res.getInt(1);
}
} catch (Exception e) {
e.printStackTrace();
// TODO: handle exception
} finally{
try {
res.close();
pstate.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
return 4.Pojo实体类（数据库里的字段）
package com.wanczy.pojo;
import java.io.Serializable;
import java.math.BigDecimal;
public class CustomerResourcePOJO implements Serializable {
private BigDecimal cid;
private String sname;
private String sadd;
private String slinkMan;
private String slinkTel;
private int clevel;
private int cstate;
private String sleader;
private String sleaderTel;
public BigDecimal getCid() {
return cid;
}
public void setCid(BigDecimal cid) {
this.cid = cid;
}
public String getSname() {
return sname;
}
public void setSname(String sname) {
this.sname = sname;
}
public String getSadd() {
return sadd;
}
public void setSadd(String sadd) {
this.sadd = sadd;
}
public String getSlinkMan() {
return slinkMan;
}
public void setSlinkMan(String slinkMan) {
this.slinkMan = slinkMan;
}
public String getSlinkTel() {
return slinkTel;
}
public void setSlinkTel(String slinkTel) {
this.slinkTel = slinkTel;
}
public int getClevel() {
return clevel;
}
public void setClevel(int clevel) {
this.clevel = clevel;
}
public int getCstate() {
return cstate;
}
public void setCstate(int cstate) {
this.cstate = cstate;
}
public String getSleader() {
return sleader;
}
public void setSleader(String sleader) {
this.sleader = sleader;
}
public String getSleaderTel() {
return sleaderTel;
}
public void setSleaderTel(String sleaderTel) {
this.sleaderTel = sleaderTel;
}
//一般构造方法都要写一个带id和一个不带id的，还有一个无参的，方便后面的增删改查以及方法的调用
public CustomerResourcePOJO(BigDecimal cid, String sname, String sadd,
String slinkMan, String slinkTel, int clevel, int cstate,
String sleader, String sleaderTel) {
super();
this.cid = cid;
this.sname = sname;
this.sadd = sadd;
this.slinkMan = slinkMan;
this.slinkTel = slinkTel;
this.clevel = clevel;
this.cstate = cstate;
this.sleader = sleader;
this.sleaderTel = sleaderTel;
}
public CustomerResourcePOJO( String sname, String sadd,
String slinkMan, String slinkTel, int clevel, int cstate,
String sleader, String sleaderTel) {
super();
this.sname = sname;
this.sadd = sadd;
this.slinkMan = slinkMan;
this.slinkTel = slinkTel;
this.clevel = clevel;
this.cstate = cstate;
this.sleader = sleader;
this.sleaderTel = sleaderTel;
}
public CustomerResourcePOJO() {
super();
}
}5.代理类以及工厂类
package com.wanczy.dao.proxy;
import java.math.BigDecimal;
import java.sql.Connection;
import java.util.List;
import com.wanczy.dao.CustomerResourceDAO;
import com.wanczy.dao.impl.CustomerResourceDAOImpl;
import com.wanczy.pojo.CustomerResourcePOJO;
import com.wanczy.pub.GetConnection;
public class CustomerResourceDAOProxy implements CustomerResourceDAO {
Connection conn = null;
CustomerResourceDAOImpl impl = null;
public CustomerResourceDAOProxy(){
try {
this.conn = GetConnection.getConn();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.impl = new CustomerResourceDAOImpl(this.conn);
}
public boolean doDel(BigDecimal cID) {
boolean flag = this.impl.doDel(cID);
this.close();
return flag;
}
public boolean doIns(CustomerResourcePOJO pojo) {
boolean flag = this.impl.doIns(pojo);
this.close();
return flag;
}
public boolean doUpd(CustomerResourcePOJO pojo) {
boolean flag = this.impl.doUpd(pojo);
this.close();
return flag;
}
public CustomerResourcePOJO findByCId(BigDecimal cID) {
CustomerResourcePOJO pojo = this.impl.findByCId(cID);
this.close();
return pojo;
}
public List findByNameLevelState(String sName,
int cLevel, int cState, int pageSize, int pageCurrent) {
List list = this.impl.findByNameLevelState(sName, cLevel, cState, pageSize, pageCurrent);
this.close();
return list;
}
public int findCountByNameLevelState(String sName, int cLevel, int cState) {
int count = this.impl.findCountByNameLevelState(sName, cLevel, cState);
this.close();
return count;
}
public void close(){
try {
this.conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
6.servlet
package com.wanczy.servlet.customerResource;
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 com.wanczy.dao.factory.CustomerResourceDAOFactory;
import com.wanczy.pojo.CustomerResourcePOJO;
public class CustomerResourceQuery extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
String sName = request.getParameter("sName");
int cLevel = Integer.parseInt(request.getParameter("cLevel"));
int cState = Integer.parseInt(request.getParameter("cState"));
int pageSize = Integer.parseInt(request.getParameter("pageSize"));
int pageCurrent = Integer.parseInt(request.getParameter("pageCurrent"));
List list = CustomerResourceDAOFactory.getDAOInstance().findByNameLevelState(sName, cLevel, cState, pageSize, pageCurrent);
int count = CustomerResourceDAOFactory.getDAOInstance().findCountByNameLevelState(sName, cLevel, cState);
PrintWriter out = response.getWriter();
StringBuffer sb = new StringBuffer();
sb.append("");
sb.append("学校名称 学校地址 联系人 联系人电话 客户等级 合作状态 院校领导 领导电话 操作 " +
""+pojo.getSname()+" " +
""+pojo.getSadd()+" " +
""+pojo.getSlinkMan()+" " +
""+pojo.getSlinkTel()+" " +
""+cLevelCode+" " +
""+cStateCode+" " +
""+pojo.getSleader()+" " +
""+pojo.getSleaderTel()+" " +
"修改 " +
"删除 " +
" ");
}
sb.append("
");
out.print(sb.toString());
out.close();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doGet(request, response);
}
}
7.web页面
<%@page contentType="text/html; charset=utf-8" %>
<% String path=request.getContextPath(); %>
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