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import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.sun.corba.se.spi.orbutil.fsm.Guard.Result;
public class DB {
// 数据库驱动类
private final static String DRIVER_NAME = "oracle.jdbc.driver.OracleDriver";
// 数据库URL地址
private static final String URL = "jdbc:oracle:thin:@localhost:1521:orcl";
// 数据库用户名
private static final String USERNAME = "scott";
// 密码
private static final String PASSWORD = "tiger";
private Connection con = null;
private PreparedStatement ps = null;
private ResultSet rs = null;
static {
try {
Class.forName(DRIVER_NAME);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
/**
* 获得数据库连接
*
* @return 数据库连接
*/
public Connection getConnection() throws ClassNotFoundException,
SQLException {
if (con == null) {
con = DriverManager.getConnection(URL, USERNAME, PASSWORD);
}
return con;
}
public ResultSet executeQuery(String sql, Object...params) throws ClassNotFoundException, SQLException {
con = this.getConnection();
ps = con.prepareStatement(sql);
for (int i = 0; i < params.length; i++) {
Object o = params[i];
if (o instanceof Date) {
Date d = (Date) o;
Timestamp t = new Timestamp(d.getTime());
ps.setTimestamp(i + 1, t);
} else {
ps.setObject(i + 1, o);
}
}
rs = ps.executeQuery();
return rs;
}
/**
* 执行查询操作，返回一个结果接
*
* @param sql 要执行的SQL语句
* @param list SQL参数的集合
* @return 结果集
* @throws SQLException
* @throws ClassNotFoundException
*/
public ResultSet executeQuery(String sql, List list) throws ClassNotFoundException, SQLException {
con = this.getConnection();
// 获得预编译语句对象
ps = con.prepareStatement(sql);
// 传递参数
if (list != null) {
for (int i = 0; i < list.size(); i++) {
Object o = list.get(i);
if (o instanceof Date) {
Date d = (Date) o;
Timestamp t = new Timestamp(d.getTime());
ps.setTimestamp(i + 1, t);
} else {
ps.setObject(i + 1, o);
}
}
}
rs = ps.executeQuery();
return rs;
}
public int executeUpdate(String sql, Object...params) throws ClassNotFoundException, SQLException {
con = this.getConnection();
ps = con.prepareStatement(sql);
for (int i = 0; i < params.length; i++) {
Object o = params[i];
if (o instanceof Date) {
Date d = (Date) o;
Timestamp t = new Timestamp(d.getTime());
ps.setTimestamp(i + 1, t);
} else {
ps.setObject(i + 1, o);
}
}
return ps.executeUpdate();
}
/**
* 执行增删改语句，返回受影响的行数
* @param sql sql语句
* @param list sql语句的参数集合
*/
public int executeUpdate(String sql, List list) throws ClassNotFoundException, SQLException {
con = this.getConnection();
ps = con.prepareStatement(sql);
if (list != null) {
for (int i = 0; i < list.size(); i++) {
Object o = list.get(i);
if (o instanceof Date) {
Date d = (Date) o;
Timestamp t = new Timestamp(d.getTime());
ps.setTimestamp(i + 1, t);
} else {
ps.setObject(i + 1, o);
}
}
}
return ps.executeUpdate();
}
/**
* 无参数的存储过程
*
* @throws SQLException
* @throws ClassNotFoundException
*/
public void prepareCall(String storename, Object... params)
throws ClassNotFoundException, SQLException {
con = this.getConnection();
String str = " call "+ storename;
cs = con.prepareCall(str);
for (int i = 0; i < params.length; i++) {
Object o = params[i];
if (o instanceof Date) {
Date d = (Date) o;
Timestamp t = new Timestamp(d.getTime());
cs.setTimestamp(i + 1, t);
} else {
cs.setObject(i + 1, o);
}
}
cs.execute();
}
/**
* 调用有输出参数 (输出参数类型只能为Stirng类型的数据)的存储过程
*
* @throws List<Integer> 指定注册类型
* @throws SQLException
* @throws ClassNotFoundException
*/
public List<String> prepareCall(String storename, List<Integer> list,
Object.. . params) throws ClassNotFoundException, SQLException {
con = this.getConnection();
String str = " call "+ storename;
cs = con.prepareCall(str);
List<Integer> klist = new ArrayList<Integer>();
List<String> relist = new ArrayList<String>();
if (params.length != 0) {
for (int i = 0; i < params.length; i++) {
Object o = params[i];
if (o instanceof Date) {
Date d = (Date) o;
Timestamp t = new Timestamp(d.getTime());
cs.setTimestamp(i + 1, t);
} else {
cs.setObject(i + 1, o);
}
if (params.length - 1 == i && list.size() != 0) {
for (int k = 0; k < list.size(); k++) {
cs.registerOutParameter((i + (k + 2)), list.get(k));
klist.add(i+(k+ 2));
}
}
}
}
cs.execute();
for(int i = 0;i<klist.size();i++){
relist.add(cs.getString(klist.get(i)));
}
return relist;
}
/**
* 关闭连接
*/
public void close() {
try {
if (rs != null) {
rs.close();
}
if (ps != null) {
ps.close();
}
if (con != null) {
con.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
DB db = new DB();
String sql = "insert into tab_message values(mesid_seq.nextval,?,?,?,sysdate,0)";
try {
db.executeUpdate(sql, "短信内容", "zhangsan", "admin");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} finally {
db.close();
}
}
}
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