基于Struts2的供求信息网设计(二)

五，dao和tools代码

JobDao.java

package com.hust.Dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.hust.Bean.JobBean;
import com.hust.tools.DBConnection;

public class JobDao {
	private DBConnection DB=new DBConnection();
	//返回title列表
	public static List<String> GetTitleList(){
		DBConnection DB=new DBConnection();
		Connection conn=DB.getCon();
		List<String> titlelist=new ArrayList<String>();
		if(conn!=null){			
			try {
				
				String sql="select Title from job ORDER BY Date DESC limit 0,4";
				PreparedStatement pstm=conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					titlelist.add(rs.getString("Title"));
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return titlelist;
	}
	//返回job对象
	public List<JobBean> GetJobList(){
		Connection conn=DB.getCon();
		List<JobBean> joblist=new ArrayList<JobBean>();
		
		if(conn!=null){
			try {
				String sql ="select * from job order by Date desc";
				PreparedStatement pstm = conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					JobBean job=new JobBean();
					job.setId(rs.getInt("id"));
					job.setTitle(rs.getString("Title"));
					job.setCompany(rs.getString("Company"));
					job.setContent(rs.getString("Content"));
					job.setTime(rs.getString("Time"));
					job.setAddress(rs.getString("Address"));
					job.setPay(rs.getString("Pay"));
					job.setRemark(rs.getString("Remark"));
					job.setLinkman(rs.getString("Linkman"));
					job.setPhone(rs.getString("Phone"));
					job.setDate(rs.getString("Date"));
					joblist.add(job);
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		/*for(int i=0;i<joblist.size();i++){
    		System.out.println(joblist.get(i).getCompany());
    	}*/
		return joblist;
	}
	//插入工作
	public boolean InsertJob(String[] s){
		Connection conn=DB.getCon();		
		if(conn!=null){
			try {
				String sql ="insert into job values(?,?,?,?,?,?,?,?,?,?,?)";
				PreparedStatement pstm = conn.prepareStatement(sql);
				pstm.setInt(1, Integer.valueOf(s[0]));
				pstm.setString(2, s[1]);
				pstm.setString(3, s[2]);
				pstm.setString(4, s[3]);
				pstm.setString(5, s[4]);
				pstm.setString(6, s[5]);
				pstm.setString(7, s[6]);
				pstm.setString(8, s[7]);
				pstm.setString(9, s[8]);
				pstm.setString(10, s[9]);
				pstm.setString(11, s[10]);
				pstm.executeUpdate();				
				return true;
				
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}		
	    return false;	    
	}
}

LectureDao.java

package com.hust.Dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.hust.Bean.LectureBean;
import com.hust.tools.DBConnection;

public class LectureDao {
	 private DBConnection DB;
	//返回title列表
	public static List<String> GetTitleList(){
		DBConnection DB=new DBConnection();
		Connection conn=DB.getCon();
		List<String> titlelist=new ArrayList<String>();
		if(conn!=null){			
			try {
				
				String sql="select Title from lecture ORDER BY Date DESC limit 0,4";
				PreparedStatement pstm=conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					titlelist.add(rs.getString("Title"));
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return titlelist;
	}
	//查询华科大讲座或者武汉讲座
	public List<LectureBean> GetLectureList(String sql){
		DB=new DBConnection();
		Connection conn=DB.getCon();
		List<LectureBean> lecturelist=new ArrayList<LectureBean>();
		if(conn!=null){
			try {
				//String sql ="select * from lecture where Sign=1 ";
				PreparedStatement pstm = conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					LectureBean lecture=new LectureBean();
					   lecture.setId(rs.getInt("Id"));
					   lecture.setTitle(rs.getString("Title"));
					   lecture.setSpeaker(rs.getString("Speaker"));
					   lecture.setIntroduce(rs.getString("Introduce"));
					   lecture.setTime(rs.getString("Time"));
					   lecture.setAddress(rs.getString("Address"));
					   lecture.setSign(rs.getString("Sign"));
					   lecture.setDate(rs.getString("Date"));
					  lecturelist.add(lecture); 
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		/*for(int i=0;i<joblist.size();i++){
    		System.out.println(joblist.get(i).getCompany());
    	}*/
		return lecturelist;		
	}
	//查询单个lecture信息
	public LectureBean getLecture(int id){
		DB=new DBConnection();
		Connection conn=DB.getCon();
		LectureBean lecture=new LectureBean();
		if(conn!=null){
			try {
				String sql ="select * from lecture where Id='"+id+"'";
				PreparedStatement pstm = conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){					
					   lecture.setId(rs.getInt("Id"));
					   lecture.setTitle(rs.getString("Title"));
					   lecture.setSpeaker(rs.getString("Speaker"));
					   lecture.setIntroduce(rs.getString("Introduce"));
					   lecture.setTime(rs.getString("Time"));
					   lecture.setAddress(rs.getString("Address"));
					   lecture.setSign(rs.getString("Sign"));
					   lecture.setDate(rs.getString("Date"));					  
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return lecture;
	}
	//插入lecture信息
	public boolean InsertLecture(String params[]){
		DB=new DBConnection();
		Connection conn=DB.getCon();
		LectureBean lecture=new LectureBean();
		if(conn!=null){
			try {
				String sql ="insert into lecture values(?,?,?,?,?,?,?,?)";
				PreparedStatement pstm = conn.prepareStatement(sql);
				pstm.setInt(1,Integer.valueOf(params[0]));
				pstm.setString(2, params[1]);
				pstm.setString(3, params[2]);
				pstm.setString(4, params[3]);
				pstm.setString(5, params[4]);
				pstm.setString(6, params[5]);
				pstm.setString(7, params[6]);
				pstm.setString(8, params[7]);
				pstm.executeUpdate();
				return true;
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return false;
	}
}

RecruitDao.java

package com.hust.Dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.hust.tools.DBConnection;

public class RecruitDao {
	
	//返回title列表
	public static List<String> GetTitleList(){
		DBConnection DB=new DBConnection();
		Connection conn=DB.getCon();
		List<String> titlelist=new ArrayList<String>();
		if(conn!=null){			
			try {
				
				String sql="select Title from recruit ORDER BY Date DESC limit 0,4";
				PreparedStatement pstm=conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					titlelist.add(rs.getString("Title"));
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return titlelist;
	}
}

RentDao.java

package com.hust.Dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.hust.tools.DBConnection;

public class RentDao {
	
	//返回title列表
	public static List<String> GetTitleList(){
		DBConnection DB=new DBConnection();
		Connection conn=DB.getCon();
		List<String> titlelist=new ArrayList<String>();
		if(conn!=null){			
			try {
				
				String sql="select Title from rent ORDER BY Date DESC limit 0,4";
				PreparedStatement pstm=conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					titlelist.add(rs.getString("Title"));
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return titlelist;
	}
}

TutorDao.java

package com.hust.Dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.hust.tools.DBConnection;

public class TutorDao {
	
	//返回title列表
	public static List<String> GetTitleList(){
		DBConnection DB=new DBConnection();
		Connection conn=DB.getCon();
		List<String> titlelist=new ArrayList<String>();
		if(conn!=null){			
			try {
				
				String sql="select Title from tutor ORDER BY Date DESC limit 0,4 ";
				PreparedStatement pstm=conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				while(rs.next()){
					titlelist.add(rs.getString("Title"));
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
		}
		return titlelist;
	}
	
}

TypeDao.java

package com.hust.Dao;

import java.sql.*;
import java.util.HashMap;
import java.util.Map;

import com.hust.tools.DBConnection;

public class TypeDao {
	  private DBConnection DB=new DBConnection();
       //放回信息类别列表
       public  Map<Integer,String> GetTypeList(){    		
    	   Connection conn=DB.getCon();
    	   Map<Integer,String> typemap=new HashMap<Integer,String>();
    	   if(conn!=null){   		 
    		 try {   			 
    			  String sql="select * from infotype order by Sign";
				  PreparedStatement pstm=conn.prepareStatement(sql);
				  ResultSet rs=pstm.executeQuery();
				  while(rs.next()){
					  Integer sign=Integer.valueOf(rs.getInt("Sign"));
					  String  name=rs.getString("Name");
					  typemap.put(sign, name);
				  }
				  rs.close();
				  pstm.close();
			    } catch (SQLException e) {				
				  e.printStackTrace();
			    } 
    	   }     	   
    	   return typemap;
       }
       
}

DateToString.java

package com.hust.tools;

import java.text.SimpleDateFormat;
import java.util.Date;

public class DateToString {
	public static String dateTimeChange(Date date){
		SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String time=format.format(date);		
		return time;
	}
}

MySuperAction.java是Action继承的类

package com.hust.tools;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionSupport;

public class MySuperAction extends ActionSupport implements SessionAware,ServletRequestAware,ServletResponseAware {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	protected HttpServletRequest request;
	protected HttpServletResponse response;
	protected Map session;

	public void setSession(Map session) {
		this.session=session;	
	}
	public void setServletRequest(HttpServletRequest request) {
		this.request=request;		
	}
	public void setServletResponse(HttpServletResponse response) {
		this.response=response;
	}	
}

PageQueryDao.java

package com.hust.tools;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import com.hust.Bean.JobBean;
import com.hust.Bean.LectureBean;
import com.hust.tools.DBConnection;

public class PageQueryDao {
	    //分页查询所有兼职信息
        public List<JobBean> getJobPageList(int page){
        	List<JobBean> list=new ArrayList<JobBean>();
        	DBConnection DB=new DBConnection();
        	Connection conn=DB.getCon();
        	String sql="select * from job order by Id desc limit ?,?";
        	try {
        		
				PreparedStatement pstm=conn.prepareStatement(sql);
				pstm.setInt(1, (page-1)*JobBean.PAGE_SIZE); //设置查询记录的开始位置
				pstm.setInt(2, JobBean.PAGE_SIZE);          //设置查询数据所返回的记录数
				ResultSet rs=pstm.executeQuery();
				 while(rs.next()){
					  JobBean job=new JobBean();
					    job.setId(rs.getInt("id"));
						job.setTitle(rs.getString("Title"));
						job.setCompany(rs.getString("Company"));
						job.setContent(rs.getString("Content"));
						job.setTime(rs.getString("Time"));
						job.setAddress(rs.getString("Address"));
						job.setPay(rs.getString("Pay"));
						job.setRemark(rs.getString("Remark"));
						job.setLinkman(rs.getString("Linkman"));
						job.setPhone(rs.getString("Phone"));
						job.setDate(rs.getString("Date"));
					    list.add(job);
				  }
				 rs.close();
				 pstm.close();
				 conn.close();
				 
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        	return list;
        }
        
        //查询总记录数
        public int FindCounts(String sql){
        	int count=0;
        	DBConnection DB=new DBConnection();
        	Connection conn=DB.getCon();
        	//String sql="select count(*) from job";
        	try {
        		
				PreparedStatement pstm=conn.prepareStatement(sql);
				ResultSet rs=pstm.executeQuery();
				if(rs.next()){//rs里就一个值
					count=rs.getInt(1);					
				}
				rs.close();
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        	return count;
        	
        }
        //查询讲座分页列表
        public List<LectureBean> getLecturePageList(int page,String sql){
        	List<LectureBean> lecturelist=new ArrayList<LectureBean>();
        	DBConnection DB=new DBConnection();
        	Connection conn=DB.getCon();
        	//String sql="select * from lecture order by Id desc limit ?,?";
        	try {        		
				PreparedStatement pstm=conn.prepareStatement(sql);
				pstm.setInt(1, (page-1)*LectureBean.PAGE_SIZE); //设置查询记录的开始位置
				pstm.setInt(2, LectureBean.PAGE_SIZE);          //设置查询数据所返回的记录数
				ResultSet rs=pstm.executeQuery();
				 while(rs.next()){
					    LectureBean lecture=new LectureBean();
					    lecture.setId(rs.getInt("id"));
					    lecture.setTitle(rs.getString("Title"));
					    lecture.setSpeaker(rs.getString("Speaker"));
					    lecture.setIntroduce(rs.getString("Introduce"));
						lecture.setTime(rs.getString("Time"));
						lecture.setAddress(rs.getString("Address"));
						lecture.setSign(rs.getString("sign"));
						lecture.setDate(rs.getString("Date"));
					    lecturelist.add(lecture);
				  }
				 rs.close();
				 pstm.close();
				 conn.close();
				 
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        	return lecturelist;
        }	
}