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ReaderTypeDAO.java
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101 lines (96 loc) · 3.07 KB
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package com.dao;
import com.core.ConnDB;
import java.util.*;
import java.sql.*;
import com.actionForm.ReaderTypeForm;
public class ReaderTypeDAO {
private ConnDB conn=new ConnDB();
//查询数据
public Collection query(String strif){
ReaderTypeForm readerTypeForm=null;
Collection readerTypeColl=new ArrayList();
String sql="";
if(strif!="all" && strif!=null && strif!=""){
sql="select * from tb_readerType where "+strif+"";
}else{
sql="select * from tb_readerType";
}
ResultSet rs=conn.executeQuery(sql);
try {
while (rs.next()) {
readerTypeForm=new ReaderTypeForm();
readerTypeForm.setId(Integer.valueOf(rs.getString(1)));
readerTypeForm.setName(rs.getString(2));
readerTypeForm.setNumber(rs.getInt(3));
readerTypeColl.add(readerTypeForm);
}
} catch (SQLException ex) {
}
conn.close();
return readerTypeColl;
}
//用于修改的查询
public ReaderTypeForm queryM(ReaderTypeForm readerTypeForm){
ReaderTypeForm readerTypeForm1=null;
String sql="select * from tb_readerType where id="+readerTypeForm.getId()+"";
System.out.println("修改时的SQL："+sql);
ResultSet rs=conn.executeQuery(sql);
try {
while (rs.next()) {
readerTypeForm1=new ReaderTypeForm();
readerTypeForm1.setId(Integer.valueOf(rs.getString(1)));
readerTypeForm1.setName(rs.getString(2));
readerTypeForm1.setNumber(rs.getInt(3));
System.out.println(rs.getInt(3));
}
} catch (SQLException ex) {
}
conn.close();
return readerTypeForm1;
}
//添加数据
public int insert(ReaderTypeForm readerTypeForm){
String sql1="SELECT * FROM tb_readerType WHERE name='"+readerTypeForm.getName()+"'";
ResultSet rs = conn.executeQuery(sql1);
String sql = "";
int falg = 0;
try {
if (rs.next()) {
falg = 2;
} else {
sql ="Insert into tb_readerType (name,number) values('"+readerTypeForm.getName()+"',"+readerTypeForm.getNumber()+")";
falg = conn.executeUpdate(sql);
System.out.println("添加读者类型的SQL：" + sql);
conn.close();
}
} catch (SQLException ex) {
falg = 0;
}
System.out.println("falg:"+falg);
return falg;
}
//修改数据
public int update(ReaderTypeForm readerTypeForm){
String sql="Update tb_readerType set name='"+readerTypeForm.getName()+"',number="+readerTypeForm.getNumber()+" where id="+readerTypeForm.getId()+"";
int falg=conn.executeUpdate(sql);
System.out.println("修改数据时的SQL："+sql);
conn.close();
return falg;
}
//删除数据
public int delete(ReaderTypeForm readerTypeForm){
String sql_1="SELECT * FROM tb_reader WHERE typeid="+readerTypeForm.getId()+"";
ResultSet rs=conn.executeQuery(sql_1);
int flag=0;
try {
if(!rs.next()){
String sql="Delete from tb_readerType where id="+readerTypeForm.getId()+"";
flag=conn.executeUpdate(sql);
System.out.println("删除时的SQL："+sql);
}
} catch (Exception e) {
e.printStackTrace();
}
return flag;
}
}