基于jsp+servlet图书管理系统之后台用户信息查询操作

package com.bie.system.dao.impl; import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List; import com.bie.po.UserInfo;
import com.bie.system.dao.UserInfoDao;
import com.bie.utils.DbUtils; /***
* 2.2：实现查询的接口
* @author biehongli
*
*/
public class UserInfoDaoImpl implements UserInfoDao{ @Override
public List<UserInfo> selectUser(String sql, Object[] arr) {
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
List<UserInfo> list=null;
try{
con=DbUtils.getCon();//连接数据库
ps=con.prepareStatement(sql);//预编译
//为查询条件设置值，如为第一个设置为什么，为第二个设置为什么
if(arr!=null && arr.length>0){
for(int i=0;i<arr.length;i++){
ps.setObject(i+1, arr[i]);
}
}
//执行sql语句
rs=ps.executeQuery();
list=new ArrayList<UserInfo>();
//根据查询条件，从数据库匹配适合的条件，然后设置这个条件的全部信息
while(rs.next()){
UserInfo user=new UserInfo();
user.setUserId(rs.getInt("user_id"));
user.setUserAccount(rs.getString("user_account"));
user.setUserPw(rs.getString("user_pw"));
user.setUserNumber(rs.getString("user_number"));
user.setUserName(rs.getString("user_name"));
user.setUserAge(rs.getInt("user_age"));
user.setUserSex(rs.getString("user_sex"));
//user.setUserMark(rs.getString("user_mark"));
//根据判断看是否是管理员或者普通会员
if("0".equals(rs.getString("user_mark"))){
user.setUserMark("普通会员");
}
if("1".equals(rs.getString("user_mark"))){
user.setUserMark("管理员");
}
//将user对象封装到集合中
list.add(user);
}
//将封装到集合中的查询条件返回
return list;
}catch(Exception e){
e.printStackTrace();
}finally{
//关闭资源，避免出现问题
DbUtils.getClose(con, ps, rs);
}
return null;
} }

package com.bie.system.service.impl; import java.util.ArrayList;
import java.util.List; import com.bie.po.UserInfo;
import com.bie.system.dao.UserInfoDao;
import com.bie.system.dao.impl.UserInfoDaoImpl;
import com.bie.system.service.UserInfoService;
import com.bie.utils.DbUtils;
import com.bie.utils.MarkUtils;
/***
* 1.4:这是业务逻辑层的实现类，实现用户信息的接口
*
* 切忌新手写好service业务逻辑层需要test测试(junit)
* @author biehongli
*
*/
public class UserInfoServiceImpl implements UserInfoService{ private UserInfoDao dao=new UserInfoDaoImpl();
@Override
public boolean insertUser(UserInfo user) {
try{
//System.out.println(user);//测试传来的UserInfo里面是否够存在用户信息
if(user!=null && user.getUserAccount()!=null){
String sql="INSERT INTO user_info(user_account,user_pw,"
+ "user_number,user_name,user_age,user_sex,user_mark)"
+ " VALUES(?,?,?,?,?,?,?)";
List<Object> list=new ArrayList<Object>();
//可以理解位将实体类中get到的信息放到数据库中，因为set设置的信息就是为了查到数据库中
list.add(user.getUserAccount());//将设置好的账号信息保存到集合中
list.add(user.getUserPw());//将设置好的账号信息保存到集合中
list.add(user.getUserNumber());//将设置好的密码信息保存到集合中
list.add(user.getUserName());//将设置好的姓名信息保存到集合中
list.add(user.getUserAge());//将设置好的年龄信息保存到集合中
list.add(user.getUserSex());//将设置好的性别信息保存到集合中
//list.add(user.getUserMark());//将设置好的标识信息保存到集合中
//后台只可以添加管理员
user.setUserMark(MarkUtils.USER_MARK_MANAGER);
//将设置为默认的管理员添加到数据库
list.add(user.getUserMark()); //将封装到集合list中的信息和sql语句传递到DbUtils封装好的 方法中
//这里sql转化位String语句，list转化位数组类型
int count=DbUtils.addAndUpdate(sql.toString(), list.toArray());
//System.out.println(count);//测试返回值是0还是1
if(count>0){
return true;//成功返回true
}else{
return false;//失败返回false
}
}
}catch(Exception e){
e.printStackTrace();
}
return false;
} @Override
public List<UserInfo> selectUser(UserInfo user) {
//使用StringBuffer进行字符串的拼接，不使用String
//StringBuffer sql=new StringBuffer("select * from user_info where 1=1 ");
StringBuffer sql=new StringBuffer("select * from user_info where 1=1 ");
//设置集合，用户存放用户信息设置值的时候使用
List<Object> list=null;
//判断用户的信息不为空的时候
if(user!=null){
list=new ArrayList<Object>();
//按照账号查询，如果账号不为null且不为空
if(user.getUserAccount()!=null && !user.getUserAccount().equals("")){
sql.append(" and user_account=?");
list.add(user.getUserAccount());
}
//按照姓名查询，如果姓名不为null且不为空
if(user.getUserName()!=null && !user.getUserName().equals("")){
sql.append(" and user_name like ?");
//模糊查询这样拼接字符串
list.add("%"+user.getUserName()+"%");
}
//按照标识查询，如果标识不为null且不为空
if(user.getUserMark()!=null && !user.getUserMark().equals("")){
sql.append(" and user_mark=?");
list.add(user.getUserMark());
}
} sql.append(" order by user_id desc");
//返回的参数，sql语句是字符类型，集合转化为数组类型
return dao.selectUser(sql.toString(), list.toArray());
} }

package com.bie.system.servlet; import java.io.IOException;
import java.util.List; import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import com.bie.po.UserInfo;
import com.bie.system.service.UserInfoService;
import com.bie.system.service.impl.UserInfoServiceImpl;
import com.my.web.servlet.RequestBeanUtils;
/***
* 2.3:点击用户管理，先调转到这个servlet,查询出数据库的信息，并且显示在页面上面
* @author biehongli
*
*/
@WebServlet("/system/userinfoselect")
public class UserInfoSelectServlet extends HttpServlet{ private static final long serialVersionUID = 1L; @Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
} @Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//将表单提交的数据封装到javabean的实体类中
UserInfo user=RequestBeanUtils.requestToSimpleBean(request, UserInfo.class);
//调用service业务逻辑层的代码
UserInfoService service=new UserInfoServiceImpl();
//调用业务逻辑层的查询方法selectUser，将返回的集合接受
List<UserInfo> list=service.selectUser(user);
//将上面的集合和user对象设置在域中，方便userinfo_list.jsp调用
request.setAttribute("list", list);
request.setAttribute("user", user);
//将转发到userinfo_list.jsp这个页面
request.getRequestDispatcher("/view/system/userinfo/userinfo_list.jsp").forward(request, response);
} }

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//获取绝对路径路径
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<%@ taglib prefix="d" uri="http://displaytag.sf.net"%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath %>" />
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>用户管理-用户查询</title>
<link href="resource/css/bootstrap.min.css" rel="stylesheet" />
<script type="text/javascript" src="resource/js/jquery.min.js"></script>
<script type="text/javascript"
src="resource/js/bootstrap.min.js"></script>
</head>
<body>
<div>
<ul class="breadcrumb" style="margin: 0px;">
<li>系统管理</li>
<li>用户管理</li>
<li>用户查询</li>
</ul>
</div>
<form action="system/userinfoselect" class="form-inline" method="post">
<div class="row alert alert-info" style="margin: 0px; padding: 5px;">
<div class="form-group">
<label>账号:</label>
<input type="text" name="userAccount" value="${user.userAccount }" class="form-control" placeholder="请输入查询账号" />
<label>姓名:</label>
<input type="text" name="userName" value="${user.userName }" class="form-control" placeholder="请输入查询姓名" />
<select class="form-control" name="userMark">
<option value="">全部</option>
<option value="0" ${user.userMark=='0'?'selected':'' }>普通会员</option>
<option value="1" ${user.userMark=='1'?'selected':'' }>管理员</option>
</select>
</div>
<input type="submit" class="btn btn-danger" value="查询"> <a
href="view/system/userinfo/userinfo_add.jsp" class="btn btn-success">添加用户</a>
</div>
<div class="row" style="padding: 15px;">
<d:table name="list" pagesize="5" requestURI="system/userinfoselect" class="table table-hover table-condensed">
<d:column property="userId" title="用户编号"></d:column>
<d:column property="userAccount" title="用户账号"></d:column>
<d:column property="userPw" title="用户密码"></d:column>
<d:column property="userNumber" title="用户学号"></d:column>
<d:column property="userName" title="用户姓名"></d:column>
<d:column property="userAge" title="用户年龄"></d:column>
<d:column property="userSex" title="用户性别"></d:column>
<d:column property="userMark" title="用户标识"></d:column> </d:table>
<!-- <table class="table table-hover table-condensed">
<tr>
<th>用户编号</th>
<th>用户账号</th>
<th>用户密码</th>
<th>用户姓名</th>
<th>用户性别</th>
<th>用户年龄</th>
<td>操作</td>
</tr>
<tr>
<td>1001</td>
<td>admin123</td>
<td>123456</td>
<td>高富帅</td>
<td>男</td>
<td>20</td>
<td><a href="view/system/userinfo/userinfo_update.jsp">修改</a> 删除</td>
</tr>
</table> -->
</div>
</form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//获取绝对路径路径
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath %>" />
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>用户管理-用户添加</title>
<link href="resource/css/bootstrap.min.css" rel="stylesheet" />
<script type="text/javascript" src="resource/js/jquery.min.js"></script>
<script type="text/javascript"
src="resource/js/bootstrap.min.js"></script>
</head>
<body>
<div>
<ul class="breadcrumb" style="margin: 0px;">
<li>系统管理</li>
<li>用户管理</li>
<li>用户添加</li>
</ul>
</div>
<form action="system/userinfoinsert" class="form-horizontal" method="post">
<h5 class="page-header alert-info"
style="margin: 0px; padding: 10px; margin-bottom: 10px;">基本信息</h5>
<!-- 开始1 -->
<div class="row">
<div class="col-xs-5">
<div class="form-group ">
<label class="col-xs-3 control-label">用户学号</label>
<div class="col-xs-9 ">
<input type="text" name="userNumber" class="form-control" placeholder="请输入用户学号" />
</div>
</div>
</div>
<div class="col-xs-5">
<div class="form-group ">
<label class="col-xs-3 control-label">用户姓名</label>
<div class="col-xs-9 ">
<input type="text" name="userName" class="form-control" placeholder="请输入用户姓名" />
</div>
</div>
</div>
</div>
<!--结束1 -->
<!-- 开始2 -->
<div class="row">
<div class="col-xs-5">
<div class="form-group ">
<label class="col-xs-3 control-label">用户年龄</label>
<div class="col-xs-9 ">
<input type="text" name="userAge" class="form-control" placeholder="请输入用户年龄" />
</div>
</div>
</div>
<div class="col-xs-5">
<div class="form-group ">
<label class="col-xs-3 control-label">用户性别</label>
<div class="col-xs-3 ">
<select class="form-control" name="userSex">
<option>保密</option>
<option>男</option>
<option>女</option>
</select>
</div>
</div>
</div> </div>
<!--结束2 --> <h5 class="page-header alert-info"
style="margin: 0px; padding: 10px; margin-bottom: 10px;">账号信息</h5>
<!-- 开始5 -->
<div class="row">
<div class="col-xs-5">
<div class="form-group ">
<label class="col-xs-3 control-label">用户账号</label>
<div class="col-xs-9">
<input type="text" name="userAccount" class="form-control" placeholder="请输入用户账号" />
</div>
</div>
</div>
<div class="col-xs-5">
<div class="form-group ">
<label class="col-xs-3 control-label">用户密码</label>
<div class="col-xs-9 ">
<input type="text" name="userPw" class="form-control" placeholder="请输入用户密码" />
</div>
</div>
</div>
</div>
<!--结束5 --> <div class="row">
<div class="col-xs-3 col-xs-offset-4">
<input type="submit" class="btn btn-success" value="保存用户" /> <input
type="reset" class="btn btn-danger" value="重置信息" />
</div> </div> </form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//获取绝对路径路径
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath %>" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<script type="text/javascript">
//此页面用来提示添加，修改，删除信息的成功或者失败的信息
alert('${info}');//提示信息，错误or成功
//跳转到user_info.jsp查询页面，后面会修改为servlet
//window.location="view/system/userinfo/userinfo_list.jsp";
//这句话的作用是当插入成功 的时候就可以显示在页面下
window.location="system/userinfoselect";
</script>
</body>
</html>

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