數據庫查找和刪除
package method;
import java.sql.*;
import javax.servlet.http.HttpServletRequest;
public class InsertDemo{
public ResultSet rs=null;
public static String JDBC_DRIVER = "com.mysql.jdbc.Driver";
public static String DB_URL = "jdbc:mysql://127.0.0.1:3306/school?useUnicode=true&characterEncoding=utf8";
// 數據庫的用戶名與密碼，需要根據自己的設置
public static String USER = "root";
public static String PASS = "123456";
public static Connection con=null;
static{
try {
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection(DB_URL, USER, PASS);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public ResultSet getDate(HttpServletRequest request){
String sql = "select * from productmanage";
String id = request.getParameter("id");
String name = request.getParameter("name");
if(id!=null && !id.equals(""))
sql="select * from productmanage where 商品編號=‘"+id+"‘ and 商品名稱 =‘"+name+"‘";
try {
PreparedStatement psmt = con.prepareStatement(sql);
rs = psmt.executeQuery();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rs;
}
public void deleteMethod(HttpServletRequest res){
String chk[] = res.getParameterValues("chk");
String chkall="";
int delrec = 0;
System.out.println("deleteMethod run!!!!!!!");
if (chk!=null)
{
for(String i:chk)
{
String sql = "delete from productmanage where 商品編號 =?";
try {
PreparedStatement psmt = con.prepareStatement(sql);
psmt.setString(1, i);
delrec = psmt.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
System.out.println("you del rec="+delrec);
}
}
//執行sql語句
}
}
}
數據庫查找和刪除