학원/JSP - 학원

게시판 1단계 2

수풀속의고라니 2022. 3. 25. 14:07
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board.js

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function check_ok(){
    if(document.reg_form.b_name.value.length ==0){
    alert("작성자를 써주세요");
    reg_form.b_name.focus();
    return;
    }
    if(document.reg_form.b_title.value.length ==0){
    alert("제목을 써주세요");
    reg_form.b_title.focus();
    return;
    }
    if(document.reg_form.b_content.value.length ==0){
    alert("글내용을 써주세요");
    reg_form.b_content.focus();
    return;
    }
    document.reg_form.submit();
}
 
 cs

 

write.jsp

- <head>안에 <script type="text/javascript" src="board.js" charset="utf-8"></script> 이거 추가

- <form>에 폼이름 지정 - reg_form

 

BoardDBBean.java

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package magic.board;
 
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
 
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;
 
public class BoardDBBean {
    
private static BoardDBBean instance = new BoardDBBean();
    
    public static BoardDBBean getInstance() {
        return instance;
    }
    
    public Connection getConnection() throws Exception {
        Context ctx = new InitialContext();
        DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/oracle");
        return ds.getConnection();
    }
    public int insertBoard(BoardBean board) {
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;;
        String sql="";
        int re = -1;
        int number;
        try {
            con = getConnection();
            sql = "select max(b_id) from boardT";
            ps = con.prepareStatement(sql);
            rs = ps.executeQuery();
            
            if(rs.next()) {
                number = rs.getInt(1)+1;
            }else {
                number=1;
            }
            sql = "insert into boardT (b_id,b_name,b_email,b_title,b_content) values(?,?,?,?,?)";
            ps = con.prepareStatement(sql);
            ps.setInt(1, number);
            ps.setString(2, board.getB_name());
            ps.setString(3, board.getB_email());
            ps.setString(4, board.getB_title());
            ps.setString(5, board.getB_content());
            ps.executeUpdate();
            re = 1;
            ps.close();
            con.close();
            System.out.println("추가 성공");
        } catch (Exception e) {
            System.out.println("추가 실패");
            e.printStackTrace();
        }finally {
            try {
                if (ps != null) ps.close();
                if (con != null) con.close();
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return re;
    }
}
 
 cs

- b_id의 최대값을 구하는 쿼리문을 먼저 받아서 조회하고 그 값을 rs에 저장

- if문을 사용해서 rs에 값이 있다면 1번 컬럼에 +1을 해서 number에 넣어줌

- 만약 값이 없다면 number에 1을 넣어줌

- 다음으로 값을 집어넣는 쿼리문을 읽도록 설정하고, 각 컬럼에 값 추가

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