java 连接Oracle数据库

用java连接Oracle数据库进行简单的查询

用sys登录进sql plus

创建用户

create user 用户 identified by 密码;

授权

grant connect,resource to 用户；

grant selet any dictionary to 用户;

grant OEM_MONITOR to 用户;

grant create any view to grant create any view to jk028;;

以jk...登录到sql plus上

conn jk...;

create table jk028.Student

(

Sno nvarchar2(16) not null,

Name nvarchar2(6),

Sex nchar(1),

Age smallint,

IdCard nvarchar2(20),

PoliticalStatus nvarchar2(6),

constraint pk_Sno primary key(Sno)

);

create table jk028.Course

Cno nvarchar2(16) not null,

CourseName nvarchar2(18),

Credit smallint,

constraint pk_Cno primary key(Cno)

create table jk028.SelectCourse

Sno nvarchar2(16) not null,

Score int,

constraint fk_Sno foreign key(Sno) references jk028.Student(Sno),

constraint fk_Cno foreign key(Cno) references jk028.Course(Cno)

create view jk028.V_学生成绩

as

select s.Sno,s.Name,s.Sex,s.IdCard,c.CourseName,c.Credit,sc.Score

from jk028.SelectCourse sc join jk028.Student s on sc.Sno=s.Sno join jk028.Course c on sc.Cno=c.Cno;

添加数据：

Student

insert into jk028.Student values('1060315014001','王1','男',20,'610203199701192911','共青团员');

insert into jk028.Student values('1060315014002','王2','女',20,'610203199701192912','共青团员');

insert into jk028.Student values('1060315014003','王3','男',20,'610203199701192913','共青团员');

insert into jk028.Student values('1060315014004','王4','女',20,'610203199701192914','共青团员');

insert into jk028.Student values('1060315014005','王5','男',20,'610203199701192915','共青团员');

Course

insert into jk028.Course values('0001','数据库',11);

insert into jk028.Course values('0002','马克思原理',12);

insert into jk028.Course values('0003','数据挖掘',13);

insert into jk028.Course values('0004','软件工程',14);

insert into jk028.Course values('0005','操作系统',15);

SelectCourse

insert into jk028.SelectCourse values('1060315014001','0001',91);

insert into jk028.SelectCourse values('1060315014002','0001',91);

insert into jk028.SelectCourse values('1060315014003','0001',91);

insert into jk028.SelectCourse values('1060315014004','0001',91);

insert into jk028.SelectCourse values('1060315014005','0001',91);

先将外部jar引入到项目文件中 将Oracle/product/11.2.0//db_home/jdbc/lib中的ojdbc6文件引入

package oraclework;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

public class ConnOracle {

private static Connection con ;

private static String user = "jk028" ; //数据库账号

private static String password = "123456" ;// 数据库密码

private static String className = "oracle.jdbc.driver.OracleDriver" ;

private static String url = "jdbc:oracle:thin:@127.0.0.1:1521:Oraclewk" ; br/>//"jdbc:oracle:thin:@127.0.0.1:1521:Oraclewk"

//参照数据库文件 Oracle/product/11.2.0//db_home/NETWORK/ADMIN/tnsnames文件中的参数

//hostname: XL2LY877TNOBUUF

public static void main(String[] args) {

// TODO Auto-generated method stub

ConnOracle c = new ConnOracle();

c.ConnectOracle();

c.getCon();

c.closed();

}

public static ResultSet select(String sql){

import java.util.ArrayList;

import java.util.Iterator;

public class StudentSelectCourse {

public static void main(String[] args) throws SQLException {

StudentSelectCourse ssc=new StudentSelectCourse();

String sql1="select from jk028.Student";

String sql2="select from jk028.Course";

String sql3="select * from jk028.V_学生成绩";

ssc.sqlselect(sql1);

ssc.sqlselect(sql2);

ssc.sqlselect(sql3);

public void sqlselect(String sql) throws SQLException{