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public class Student
{
private Integer studId;
private String name;
private String email;
private Date dob;
// setters and getters
}
public Student findStudentById(int studId)
{
Student student = null;
Connection conn = null;
try{
//obtain connection
conn = getDatabaseConnection();
String sql = "SELECT * FROM STUDENTS WHERE STUD_ID=?";
//create PreparedStatement
PreparedStatement pstmt = conn.prepareStatement(sql);
//set input parameters
pstmt.setInt(1, studId);
ResultSet rs = pstmt.executeQuery();
//fetch results from database and populate into Java objects
if(rs.next()) {
student = new Student();
student.setStudId(rs.getInt("stud_id"));
student.setName(rs.getString("name"));
student.setEmail(rs.getString("email"));
student.setDob(rs.getDate("dob"));
}
} catch (SQLException e){
throw new RuntimeException(e);
}finally{
//close connection
if(conn!= null){
try {
conn.close();
} catch (SQLException e){ }
}
}
return student;
}
public void createStudent(Student student)
{
Connection conn = null;
try{
//obtain connection
conn = getDatabaseConnection();
String sql = "INSERT INTO STUDENTS(STUD_ID,NAME,EMAIL,DOB)
VALUES(?,?,?,?)";
//create a PreparedStatement
PreparedStatement pstmt = conn.prepareStatement(sql);
//set input parameters
pstmt.setInt(1, student.getStudId());
pstmt.setString(2, student.getName());
pstmt.setString(3, student.getEmail());
pstmt.setDate(4, new
java.sql.Date(student.getDob().getTime()));
pstmt.executeUpdate();
} catch (SQLException e){
throw new RuntimeException(e);
}finally{
//close connection
if(conn!= null){
try {
conn.close();
} catch (SQLException e){ }
}
}
}
protected Connection getDatabaseConnection() throws SQLException
{
try{
Class.forName("com.mysql.jdbc.Driver");
return DriverManager.getConnection
("jdbc:mysql://localhost:3306/test", "root", "admin");
} catch (SQLException e){
throw e;
} catch (Exception e){
throw new RuntimeException(e);
}
}
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原文地址:http://www.cnblogs.com/tedbear/p/5324439.html