?? querybean.java
字號:
import java.sql.*;
public class QueryBean
{
public String query_statement; /*定義sql語句*/
public String param[]; /*查詢條件*/
public ResultSet result=null; /*查詢結果*/
public Connection conn;
//設置查詢參數
public void setParam(String[] param)
{
this.param=param;
}
//設置SQL查詢語句
public void setQuerystatement(String query_statement)
{
this.query_statement=query_statement;
}
//設置連接參數
public void setConnection(String driverName,String jdbcURL,String username,String passwd) throws Exception
{
Connection conn1;
Class.forName(driverName);
conn1=DriverManager.getConnection(jdbcURL,username,passwd);
conn1.setAutoCommit(false);
this.conn = conn1;
}
/*獲取查詢結果*/
public ResultSet getResult()
{
try
{
PreparedStatement select_stm=conn.prepareStatement(query_statement,java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_READ_ONLY);
if (param!=null)
for(int i=0;i<param.length;i++)
select_stm.setString(i+1,param[i]);
result=select_stm.executeQuery();
}catch(Exception e){System.out.println(e);}
return result;
}
/*對數據庫進行增加記錄操作*/
public void insertRecord() throws SQLException,java.io.UnsupportedEncodingException
{
try
{
PreparedStatement insert_stm=conn.prepareStatement(query_statement);
if (param!=null)
for(int i=0;i<param.length;i++)
insert_stm.setString(i+1,param[i]);
insert_stm.executeUpdate();
insert_stm.close();
conn.commit();
}
catch(Exception e)
{
System.out.println(e);
conn.rollback();
}
}
/*對數據記錄進行更新操作*/
public void updateRecord() throws SQLException,java.io.UnsupportedEncodingException
{
try
{
PreparedStatement update_stm=conn.prepareStatement(query_statement);
if (param!=null)
for (int i=0;i<param.length;i++)
update_stm.setString(i+1,param[i]);
update_stm.executeUpdate();
update_stm.close();
conn.commit();
}
catch(Exception e)
{
System.out.println(e);
conn.rollback();
}
}
/*刪除數據記錄*/
public void deleteRecord() throws SQLException,java.io.UnsupportedEncodingException
{
try
{
PreparedStatement delete_stm=conn.prepareStatement(query_statement);
if (param!=null)
for (int i=0;i<param.length;i++)
delete_stm.setString(i+1,param[i]);
delete_stm.executeUpdate();
delete_stm.close();
conn.commit();
}
catch(Exception e)
{
System.out.println(e);
conn.rollback();
}
}
}
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