jianglibean.java

JSP开发的学生信息管理系统

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   JiangliBean.java

package mypackage;

import java.io.PrintStream;
import java.sql.*;

// Referenced classes of package mypackage:
//			DataBaseConnection, Jiangli

public class JiangliBean
{

	private Connection con;

	public JiangliBean()
	{
		con = null;
		con = DataBaseConnection.getConnection();
	}

	public boolean existXuesheng(Jiangli jiangli)
	{
		boolean flag = false;
		try
		{
			String s = jiangli.getStudentId();
			PreparedStatement preparedstatement = con.prepareStatement("select * from xuesheng where studentId='" + s + "' and flag='" + 1 + "'");
			ResultSet resultset = preparedstatement.executeQuery();
			if (resultset.next())
				flag = true;
			if (resultset != null)
				resultset.close();
			if (preparedstatement != null)
				preparedstatement.close();
		}
		catch (Exception exception)
		{
			exception.printStackTrace();
		}
		return flag;
	}

	public String addJiangli(Jiangli jiangli)
	{
		PreparedStatement preparedstatement;
		preparedstatement = null;
		String s = "";
		String s2;
		if (existXuesheng(jiangli))
			break MISSING_BLOCK_LABEL_23;
		s2 = "notExist";
		return s2;
		String s1;
		try
		{
			preparedstatement = con.prepareStatement("insert into jiangli(jiangliName,studentId,jiangliDate,jiangliType,jiangliDescript) values(?,?,?,?,?)");
			preparedstatement.setString(1, jiangli.getJiangliName());
			preparedstatement.setString(2, jiangli.getStudentId());
			preparedstatement.setString(3, jiangli.getJiangliDate());
			preparedstatement.setString(4, jiangli.getJiangliType());
			preparedstatement.setString(5, jiangli.getJiangliDescript());
			preparedstatement.execute();
			s1 = "sucess";
		}
		catch (SQLException sqlexception)
		{
			System.err.println(sqlexception.getMessage());
			s1 = "failer";
		}
		break MISSING_BLOCK_LABEL_165;
		local;
		try
		{
			preparedstatement.close();
			con.close();
		}
		catch (Exception exception1)
		{
			exception1.printStackTrace();
		}
		JVM INSTR ret 6;
		return s1;
	}

	public String updateJiangli(Jiangli jiangli)
	{
		PreparedStatement preparedstatement = null;
		String s = "";
		try
		{
			preparedstatement = con.prepareStatement("update jiangli set jiangliName=?,jiangliDate=?,jiangliType=?,jiangliDescript=? where jiangliId=?");
			preparedstatement.setString(1, jiangli.getJiangliName());
			preparedstatement.setString(2, jiangli.getJiangliDate());
			preparedstatement.setString(3, jiangli.getJiangliType());
			preparedstatement.setString(4, jiangli.getJiangliDescript());
			preparedstatement.setInt(5, jiangli.getJiangliId());
			preparedstatement.execute();
			s = "sucess";
		}
		catch (SQLException sqlexception)
		{
			System.err.println(sqlexception.getMessage());
			s = "failer";
		}
		finally
		{
			try
			{
				preparedstatement.close();
				con.close();
			}
			catch (Exception exception1)
			{
				exception1.printStackTrace();
			}
		}
		return s;
	}

	public String deleteJiangli(int i)
	{
		PreparedStatement preparedstatement = null;
		String s = "";
		try
		{
			preparedstatement = con.prepareStatement("delete from jiangli where jiangliId=?");
			preparedstatement.setInt(1, i);
			preparedstatement.execute();
			s = "sucess";
		}
		catch (SQLException sqlexception)
		{
			System.err.println(sqlexception.getMessage());
			s = "failer";
		}
		finally
		{
			try
			{
				preparedstatement.close();
				con.close();
			}
			catch (Exception exception1)
			{
				exception1.printStackTrace();
			}
		}
		return s;
	}

	public ResultSet executeQuery(String s)
	{
		Object obj = null;
		ResultSet resultset = null;
		try
		{
			Statement statement = con.createStatement(1005, 1008);
			resultset = statement.executeQuery(s);
		}
		catch (SQLException sqlexception)
		{
			System.err.println(sqlexception.getMessage());
		}
		return resultset;
	}

	public void close()
	{
		try
		{
			con.close();
		}
		catch (SQLException sqlexception)
		{
			sqlexception.printStackTrace();
		}
	}

	public String getAllClass()
	{
		Object obj = null;
		Object obj1 = null;
		StringBuffer stringbuffer = new StringBuffer();
		try
		{
			Statement statement = con.createStatement(1005, 1008);
			String s;
			for (ResultSet resultset = statement.executeQuery("select distinct className from banji"); resultset.next(); stringbuffer.append("<option value='" + s + "'>" + s + "</option>\n"))
				s = resultset.getString("className");

		}
		catch (SQLException sqlexception)
		{
			return "";
		}
		return stringbuffer.toString();
	}
}