jdbcbean.java

用eclipse3.3和myeclipse6.o开发的简单登录系统用到的数据库为DB2 8.2

package cn.itcareers.database;

import java.sql.*;

public class JdbcBean {
	private Connection conn;
	private Statement stmt;

	public JdbcBean() {
		try {
			Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");
			conn = DriverManager.getConnection("jdbc:db2:mydb");
			stmt = conn.createStatement();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	public ResultSet query(String sql) {
		ResultSet rs = null;
		try {
			rs = stmt.executeQuery(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return rs;
	}

	public int update(String sql) {
		int temp = 0;
		try {
			temp = stmt.executeUpdate(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return temp;
	}

	public int[] batchUpdate(String[] sqls) {
		int[] temp = null;
		try {
			conn.setAutoCommit(false);
			for (int i = 0; i < sqls.length; i++) {
				stmt.addBatch(sqls[i]);
			}
			temp = stmt.executeBatch();
			conn.commit();
		} catch (SQLException e) {
			e.printStackTrace();
			try {
				conn.rollback();
			} catch (SQLException e1) {
				e1.printStackTrace();
			}
		}
		return temp;
	}

	public void close() {
		try {
			if (stmt != null) {
				stmt.close();
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		try {
			if (conn != null) {
				conn.close();
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}

	}


}