简单查询 打印结果
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class TextMysql {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stubr
Connection connection = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
// connection=DriverManager.getConnection("jdbc:mysql://localhost:3306/bookshop","root",
// "admin");
connection = DriverManager.getConnection(
"jdbc:mysql://localhost/bookshop", "root", "admin");
ps = connection.prepareStatement("select * from t_user");
rs = ps.executeQuery();
while (rs.next()) {
System.out.println(rs.getString(1) + "\t" + rs.getString(2));
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class JDBCDemo {
public static void main(String[] args) throws SQLException{
// TODO Auto-generated method stub
Connection conn = null;
Statement statement = null;
ResultSet resultSet = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn = DriverManager.getConnection(
"jdbc:sqlserver://localhost:1433;database=demodb", "admin",
"admin");
statement = conn.createStatement();
resultSet = statement
.executeQuery("select name,password from t_user");
while (resultSet.next()) {
String name = resultSet.getString("name");
String password = resultSet.getString("password");
System.out.println(name + " " + password);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (conn != null) {
conn.close();
}
}
}
}
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ConnectionSQLServer {
public static void main(String[] args) {
ResultSet resultSet = null;
Statement stmt = null;
Connection conn = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
String url = "jdbc:sqlserver://localhost:1433;database=demodb";
String name = "admin";
String pass = "admin";
String sqlStr = "select name,password from t_user";
conn = DriverManager.getConnection(url, name, pass);
stmt = conn.createStatement();
resultSet = stmt.executeQuery(sqlStr);
while (resultSet.next()) {
String str1 = resultSet.getString(1);
String str2 = resultSet.getString(2);
System.out.println(str1 + " " + str2);
}
} catch (ClassNotFoundException ce) {
ce.printStackTrace();
} catch (SQLException se) {
se.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ConnectionOracle {
public static void main(String[] args) {
try {
Class.forName("oracle.jdbc.OracleDriver");
String url = "jdbc:oracle:thin:@127.0.0.1:1521:king11g";
String name = "programmer";
String pass = "password";
String sqlStr = "select username,email from o_user";
Connection conn = DriverManager.getConnection(url, name, pass);
Statement stmt = conn.createStatement();
ResultSet resultSet = stmt.executeQuery(sqlStr);
while (resultSet.next()) {
String str1 = resultSet.getString(1);
String str2 = resultSet.getString(2);
System.out.println(str1 + " " + str2);
}
if (resultSet != null) {
resultSet.close();
}
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
} catch (SQLException se) {
se.printStackTrace();
} catch (ClassNotFoundException ce) {
ce.printStackTrace();
}
}
}