JDBC

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import static org.junit.Assert.*;   import java.sql.Connection; import java.sql.Date; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement;   import org.junit.Test;     public class LianXi {       @Test     public void test() {         Connection conn = null;         PreparedStatement ps = null;         ResultSet rs = null;         Statement statement = null;         String sql = null;                   String driverClass = "com.mysql.jdbc.Driver";         String jdbcUrl = "jdbc:mysql:///test";         String user = "root";         String password = "root";                   try {             Class.forName(driverClass);             conn = DriverManager.getConnection(jdbcUrl,user,password);                           //插入数据             sql = "INSERT INTO customer (name,birth,email) VALUES(?,?,?)";             ps = conn.prepareStatement(sql);             ps.setString(1, "abdc");             ps.setDate(2, new Date(new java.util.Date().getTime()));             ps.setString(3, "123@com");             ps.executeUpdate();                           //查询结果集             sql = "SELECT * FROM customer";             statement = conn.createStatement();             rs = statement.executeQuery(sql);             while(rs.next()){                 int id = rs.getInt("id");                 String name = rs.getString("name");                 String email = rs.getString("email");                 Date date = rs.getDate("birth");                 System.out.println(id+" "+name+" "+email+" "+date);                               }         } catch (ClassNotFoundException e) {             e.printStackTrace();         } catch (SQLException e) {             e.printStackTrace();         }               }   }