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

  1 package com.xsl.dao;
  2 
  3 import java.io.IOException;
  4 import java.io.InputStream;
  5 import java.lang.reflect.Field;
  6 import java.lang.reflect.Method;
  7 import java.sql.Connection;
  8 import java.sql.Date;
  9 import java.sql.DriverManager;
 10 import java.sql.PreparedStatement;
 11 import java.sql.ResultSet;
 12 import java.sql.SQLException;
 13 import java.sql.Statement;
 14 import java.util.ArrayList;
 15 import java.util.List;
 16 import java.util.Properties;
 17 
 18 import com.xsl.entity.Student;
 19 
 20 public class BaseDao {
 21     
 22     private static Properties ps = new Properties();
 23     
 24     static{
 25         InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("com/xsl/conf/jdbc.properties");
 26         try {
 27             ps.load(is);
 28             System.out.println(ps);
 29         } catch (IOException e) {
 30             e.printStackTrace();
 31         }
 32     }
 33     
 34     /**
 35      * 获得数据库连接
 36      */
 37     public static Connection getConnection(){
 38         Connection conn = null;
 39         try {
 40             Class.forName(ps.getProperty("driver"));        //"oracle.jdbc.driver.OracleDriver"
 41             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"
 42         } catch (ClassNotFoundException e) {
 43             e.printStackTrace();
 44         } catch (SQLException e) {
 45             e.printStackTrace();
 46         }
 47         return conn;
 48     }
 49     
 50     /**
 51      * 添加
 52      * @param obj:需要被保存的对象
 53      * @return 受影响的行数
 54      */
 55     public static int save(Object obj){
 56         //insert into 表名(列名1，列名2...) values(?,?...)
 57         int row = 0;
 58         //获取需要被保存实体对象的Class类型的对象
 59         Class c = obj.getClass();
 60         //获取实体类中的属性对象
 61         Field [] fs =  c.getDeclaredFields();
 62         //给属性对象解锁
 63         Field.setAccessible(fs, true);
 64         //拼SQL语句
 65         StringBuffer sql = new StringBuffer();
 66         sql.append(" insert into ");
 67         sql.append(c.getSimpleName());//添加表名
 68         sql.append(" ( ");
 69         for(int i=1;i//添加列名
 70             sql.append(fs[i].getName());
 71             if(i//判断没有到最后一个列
 72                 sql.append(" , ");
 73             }
 74         }
 75         sql.append(" ) ");
 76         sql.append(" values (");
 77         for(int i=1;i){
 78             sql.append(" ? ");
 79             if(i){
 80                 sql.append(" , ");
 81             }
 82         }
 83         sql.append(" ) ");
 84         System.out.println(sql);
 85         Connection conn = getConnection();
 86         PreparedStatement pstmt = null;
 87         try {
 88             pstmt = conn.prepareStatement(sql.toString());
 89             //给占位符赋值
 90             for(int i=1;i){
 91                 //stu.getName();stu.getMoney();
 92                 //fs[i].get(obj)从obj这个对象中获取fs[i]这个属性对应的值
 93                 pstmt.setObject(i, fs[i].get(obj));
 94             }
 95             row = pstmt.executeUpdate();
 96         } catch (Exception e) {
 97             e.printStackTrace();
 98         }finally{
 99             closeAll(conn, pstmt, null);
100         }
101         return row;
102     }
103     
104     /**
105      * 查询
106      */
107     public static List queryList(Class c){
108         List list = new ArrayList();
109         Field [] fs = c.getDeclaredFields();
110         Field.setAccessible(fs, true);
111         //select * from 表名
112         StringBuffer sql = new StringBuffer();
113         sql.append(" select * from ");
114         sql.append(c.getSimpleName());
115         Connection conn = getConnection();
116         PreparedStatement pstmt = null;
117         ResultSet rs = null;
118         try {
119             pstmt = conn.prepareStatement(sql.toString());
120             rs = pstmt.executeQuery();
121             while(rs.next()){
122                 //Student stu = new Student();
123                 //stu.setName(rs.getString("name"));
124                 //stu.setMoney(rs.getDouble("money"));
125                 Object obj =  c.newInstance();
126                 for(int i=0;i){
127                     //fs[i].get(obj);stu.getName();
128                     //fs[i].getName()获取属性名
129                     //rs.getObject(Objet obj)在结果集中按列名取值
130                     //fs[i].set(obj,value);调用属性的赋值方法，给属性赋值
131                     fs[i].set(obj, rs.getObject(fs[i].getName()));//stu.setName(rs.getString("name"));
132                 }
133                 list.add(obj);
134             }
135         } catch (Exception e) {
136             e.printStackTrace();
137         }finally{
138             closeAll(conn, pstmt, rs);
139         }
140         return list;
141     }
142     
143     /**
144      * 删除
145      */
146     public static int delete(Object obj){
147         int row = 0;
148         //delete from 表名 where 主键=?
149         Class c = obj.getClass();
150         Field [] fs = c.getDeclaredFields();
151         Field.setAccessible(fs, true);
152         StringBuffer sql = new StringBuffer();
153         sql.append(" delete from ");
154         sql.append(c.getSimpleName());
155         sql.append(" where ");
156         sql.append(fs[0].getName());
157         sql.append(" = ?");
158         //System.out.println(sql);
159         Connection  conn = getConnection();
160         PreparedStatement pstmt = null;
161         ResultSet rs = null;
162         try {
163             pstmt = conn.prepareStatement(sql.toString());
164             pstmt.setObject(1, fs[0].get(obj));
165             row = pstmt.executeUpdate();
166         } catch (Exception e) {
167             e.printStackTrace();
168         }finally{
169             closeAll(conn, pstmt, rs);
170         }
171         return row;
172     }
173 
174     /**
175      * 关闭数据库连接
176      */
177     public static void closeAll(Connection conn,Statement pstmt,ResultSet rs){
178         try{
179             if(rs!=null){
180                 rs.close();
181             }
182             if(pstmt!=null){
183                 pstmt.close();
184             }
185             if(conn!=null){
186                 conn.close();
187             }
188         }catch (Exception e) {
189             e.printStackTrace();
190         }
191     }
192     
193     
194     public static void main(String[] args) {
195         //System.out.println(getConnection());
196         //save(new Student("刘二狗",888,new Date(System.currentTimeMillis())));
197         /*List list =  queryList(Student.class);
198         for(Student stu:list){
199             System.out.println(stu.getId()+"\t"+stu.getName()+"\t"+stu.getMoney()+"\t"+stu.getBrithday());
200         }*/
201         delete(new Student(16));
202         
203     }
204 }

 测试

 1 public class Test 
 2 {
 3     public static void main(String[] args) 
 4     {
 5         //1、获取hibernate中的配置信息（获取数据库的详细信息）
 6         Configuration cofig = new Configuration().configure();
 7         //2、创建session工厂
 8         SessionFactory factory = config.buildSessionFactory();
 9         //3、获取session对象（connection）
10         Session session = factory.openSession();
11         //4、开启事务
12         session.beginTransaction();
13         
14         Student s = new Student();
15         s.setAge(11);
16         s.setName("xsl");
17 
18         //5、保存
19         session.save(s);
20         //6、事务提交
21         session.getTransaction().commit();
22         //7、session关闭
23         session.close();
24     }
25 }

 

转载于:https://www.cnblogs.com/xsl1995/p/6285258.html