myeclipse连接数据库oracle（添加jdbc.properties）

第一步：在src下面建一个包com.xsl.conf

第二步：在建好的包下面新建一个jdbc.properties

第三步：在jdbc.properties里写入内容如下：

　　driver = oracle.jdbc.driver.OracleDriver

　　url = jdbc:oracle:thin:@127.0.0.1:1521:orcl或jdbc:oracle:thin:@localhost:1521:orcl

　　uname = scott

　　upwd = tiger

第四步：建BaseDao

 package com.xsl.dao;

 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.sql.Connection;
 import java.sql.Date;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;

 import com.xsl.entity.Student;

 public class BaseDao {

     private static Properties ps = new Properties();

     static{
         InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("com/xsl/conf/jdbc.properties");
         try {
             ps.load(is);
             System.out.println(ps);
         } catch (IOException e) {
             e.printStackTrace();
         }
     }

     /**
      * 获得数据库连接
      */
     public static Connection getConnection(){
         Connection conn = null;
         try {
             Class.forName(ps.getProperty("driver"));        //"oracle.jdbc.driver.OracleDriver"
             conn = DriverManager.getConnection(ps.getProperty("url"),ps.getProperty("uname"),ps.getProperty("upwd"));        //"jdbc:oracle:thin:@127.0.0.1:1521:orcl","scott","tiger"或//"jdbc:oracle:thin:@localhost:orcl","scott","tiger"
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return conn;
     }

     /**
      * 添加
      * @param obj:需要被保存的对象
      * @return 受影响的行数
      */
     public static int save(Object obj){
         //insert into 表名(列名1，列名2...) values(?,?...)
         int row = 0;
         //获取需要被保存实体对象的Class类型的对象
         Class c = obj.getClass();
         //获取实体类中的属性对象
         Field [] fs =  c.getDeclaredFields();
         //给属性对象解锁
         Field.setAccessible(fs, true);
         //拼SQL语句
         StringBuffer sql = new StringBuffer();
         sql.append(" insert into ");
         sql.append(c.getSimpleName());//添加表名
         sql.append(" ( ");
         for(int i=1;i<fs.length;i++){//添加列名
             sql.append(fs[i].getName());
             if(i<fs.length-1){//判断没有到最后一个列
                 sql.append(" , ");
             }
         }
         sql.append(" ) ");
         sql.append(" values (");
         for(int i=1;i<fs.length;i++){
             sql.append(" ? ");
             if(i<fs.length-1){
                 sql.append(" , ");
             }
         }
         sql.append(" ) ");
         System.out.println(sql);
         Connection conn = getConnection();
         PreparedStatement pstmt = null;
         try {
             pstmt = conn.prepareStatement(sql.toString());
             //给占位符赋值
             for(int i=1;i<fs.length;i++){
                 //stu.getName();stu.getMoney();
                 //fs[i].get(obj)从obj这个对象中获取fs[i]这个属性对应的值
                 pstmt.setObject(i, fs[i].get(obj));
             }
             row = pstmt.executeUpdate();
         } catch (Exception e) {
             e.printStackTrace();
         }finally{
             closeAll(conn, pstmt, null);
         }
         return row;
     }

     /**
      * 查询
      */
     public static List queryList(Class c){
         List list = new ArrayList();
         Field [] fs = c.getDeclaredFields();
         Field.setAccessible(fs, true);
         //select * from 表名
         StringBuffer sql = new StringBuffer();
         sql.append(" select * from ");
         sql.append(c.getSimpleName());
         Connection conn = getConnection();
         PreparedStatement pstmt = null;
         ResultSet rs = null;
         try {
             pstmt = conn.prepareStatement(sql.toString());
             rs = pstmt.executeQuery();
             while(rs.next()){
                 //Student stu = new Student();
                 //stu.setName(rs.getString("name"));
                 //stu.setMoney(rs.getDouble("money"));
                 Object obj =  c.newInstance();
                 for(int i=0;i<fs.length;i++){
                     //fs[i].get(obj);stu.getName();
                     //fs[i].getName()获取属性名
                     //rs.getObject(Objet obj)在结果集中按列名取值
                     //fs[i].set(obj,value);调用属性的赋值方法，给属性赋值
                     fs[i].set(obj, rs.getObject(fs[i].getName()));//stu.setName(rs.getString("name"));
                 }
                 list.add(obj);
             }
         } catch (Exception e) {
             e.printStackTrace();
         }finally{
             closeAll(conn, pstmt, rs);
         }
         return list;
     }

     /**
      * 删除
      */
     public static int delete(Object obj){
         int row = 0;
         //delete from 表名 where 主键=?
         Class c = obj.getClass();
         Field [] fs = c.getDeclaredFields();
         Field.setAccessible(fs, true);
         StringBuffer sql = new StringBuffer();
         sql.append(" delete from ");
         sql.append(c.getSimpleName());
         sql.append(" where ");
         sql.append(fs[0].getName());
         sql.append(" = ?");
         //System.out.println(sql);
         Connection  conn = getConnection();
         PreparedStatement pstmt = null;
         ResultSet rs = null;
         try {
             pstmt = conn.prepareStatement(sql.toString());
             pstmt.setObject(1, fs[0].get(obj));
             row = pstmt.executeUpdate();
         } catch (Exception e) {
             e.printStackTrace();
         }finally{
             closeAll(conn, pstmt, rs);
         }
         return row;
     }

     /**
      * 关闭数据库连接
      */
     public static void closeAll(Connection conn,Statement pstmt,ResultSet rs){
         try{
             if(rs!=null){
                 rs.close();
             }
             if(pstmt!=null){
                 pstmt.close();
             }
             if(conn!=null){
                 conn.close();
             }
         }catch (Exception e) {
             e.printStackTrace();
         }
     }

     public static void main(String[] args) {
         //System.out.println(getConnection());
         //save(new Student("刘二狗",888,new Date(System.currentTimeMillis())));
         /*List<Student> list =  queryList(Student.class);
         for(Student stu:list){
             System.out.println(stu.getId()+"\t"+stu.getName()+"\t"+stu.getMoney()+"\t"+stu.getBrithday());
         }*/
         delete(new Student(16));

     }
 }

测试

 public class Test
 {
     public static void main(String[] args)
     {
         //1、获取hibernate中的配置信息（获取数据库的详细信息）
         Configuration cofig = new Configuration().configure();
         //2、创建session工厂
         SessionFactory factory = config.buildSessionFactory();
         //3、获取session对象（connection）
         Session session = factory.openSession();
         //4、开启事务
         session.beginTransaction();

         Student s = new Student();
         s.setAge(11);
         s.setName("xsl");

         //5、保存
         session.save(s);
         //6、事务提交
         session.getTransaction().commit();
         //7、session关闭
         session.close();
     }
 }