Java连接Oracle数据库示例

1.数据库复用模块

package cn.jzy.database;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DBFcatory {
	Connection conn ;
	public DBFcatory(){
		getConnection();
	}
	private Connection getConnection() {
		conn=null;
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:jzy","jzy","123456");
		
		} catch (Exception e) {
			e.printStackTrace();
		}
		return conn;
	}
	//增，删，改操作
	public void OracleExecute(String sql,Object[] params){
		try {
			if(conn==null){
				conn=getConnection();
			}
			PreparedStatement pstm=conn.prepareStatement(sql);
			for(int i=0;i<params.length;i++){
				pstm.setObject(i+1, params[i]);
			}
			pstm.execute();
			closeConnection();
			System.out.println("执行成功");
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public ResultSet OracleExecuteQuery(String sql,Object[] params){
		ResultSet rs=null;
		try {
			if(conn==null){
				conn=getConnection();
			}
			PreparedStatement pstm=conn.prepareStatement(sql);
			for(int i=0;i<params.length;i++){
				pstm.setObject(i+1, params[i]);
			}
			rs=pstm.executeQuery();		
			System.out.println("查找成功");
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return rs;
	}
	
	public void closeConnection(){
		try {
			if(conn!=null){
				conn.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			conn=null;
		}
	}
}

2.数据库测试模块

package cn.jzy.database;

import java.sql.ResultSet;

public class TestDBFActory {

	public static void main(String[] args) {
		DBFcatory dbf=new DBFcatory();
		String sql="insert into emp values (seq_emp.Nextval,?,?,?,?,?,?,?,?)";
		Object[] params={1,"小五",20,"女","员工","1",5000,"成都"};
		dbf.OracleExecute(sql, params);
		
		String sql2="select * from emp where id=?";
		Object[] params2={1};
		try{
		ResultSet rs=dbf.OracleExecuteQuery(sql2, params2);
		while(rs.next()){
			System.out.println(rs.getString("name"));
		}
		dbf.closeConnection();
		}catch(Exception e){
			e.printStackTrace();
		}
	}

}