SQLServer数据库链接封 sql sql语句 SQLServer 库链接封

SQLServer数据库链接封
package util;
/**
*创建连接数据库的相关服务，方便调用
*@author wu
*/
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
public class jdbcutil {
private static final String DRIVER_CLASS_NAME;
private static final String URL;
private static final String USER_NAME;
private static final String PASSWORD;
public static Connection getSqlServerConn() {
return null;
}
// 设定数据库相关参数
static {
DRIVER_CLASS_NAME = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
URL = "jdbc:sqlserver://115.156.***.*:1433;databaseName=SpringJdbcTest";
USER_NAME = "sa";
PASSWORD = "123456";
}
public static Connection getconnection() {
Connection conn = null;
try {
Class.forName(DRIVER_CLASS_NAME);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
try {
conn = DriverManager.getConnection(URL, USER_NAME, PASSWORD);
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
// 测试数据库链接
public static void main(String[] args) throws SQLException {
Statement stmt = null;
ResultSet rs = null;
String SQL = "SELECT TOP 5 * FROM bookInfo";
jdbcutil jd = new jdbcutil();
Connection conn = jd.getconnection();
try {
stmt = conn.createStatement();
} catch (SQLException e) {
e.printStackTrace();
}
System.out.println(SQL);
try {
rs = stmt.executeQuery(SQL);
} catch (SQLException e) {
e.printStackTrace();
}
System.out.println(rs);
stmt.close();
conn.close();
// 网络测试
ResultSetMetaData rsmd = rs.getMetaData();
int columnsNumber = rsmd.getColumnCount();
while (rs.next()) {
for (int i = 1; i <= columnsNumber; i++) {
if (i > 1) System.out.print(", ");
String columnValue = rs.getString(i);
System.out.print(columnValue + " " + rsmd.getColumnName(i));
// System.out.println("列："+columnsNumber);
}
System.out.println("");
}
}
// 执行sql语句
public static boolean exeSql(String sql) {
Connection conn = null;
Statement stmt = null;
try {
conn = jdbcutil.getconnection();
stmt = conn.createStatement();
stmt.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
return false;
} finally {
closeConnection(stmt, conn);
}
return true;
}
/**
* 关闭Statement
*
* @param stmt
*/
private static void closeStatement(Statement stmt) {
if (stmt != null) {
try {
stmt.close();
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
/**
* 关闭Statement、Connection
*
* @param stmt
* @param con
*/
private static void closeConnection(Statement stmt, Connection con) {
closeStatement(stmt);
closeConnection(con);
}
/**
* 关闭Connection
*
* @param con
*/
private static void closeConnection(Connection con) {
if (con != null) {
try {
con.close();
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
}