如何在 oracle SQL 开发人员中插入数据

Question

I would like to insert data in Oracle SQL Developer.我想在 Oracle SQL Developer 中插入数据。 On client side which I mean the web page, it displays the data has been inserted, but when I check it in SQL Developer, no data was inserted.在客户端，我的意思是 web 页面，它显示数据已插入，但是当我在 SQL Developer 中检查时，没有插入数据。

And I see this error message:我看到了这个错误信息：

Caused by: Error: 1400, Position: 88, Sql = INSERT INTO noticebook(NUM, NAME, EMAIL, CONTENTS) VALUES(BOOK_NUM.NEXTVAL, :1, :2, :3 ), OriginalSql = INSERT INTO noticebook(NUM, NAME, EMAIL, CONTENTS) VALUES(BOOK_NUM.NEXTVAL, ?, ?, ?), Error Msg = ORA-01400: NULL ("C##YESMONDAY"."NOTICEBOOK"."CONTENTS") Caused by: Error: 1400, Position: 88, Sql = INSERT INTO noticebook(NUM, NAME, EMAIL, CONTENTS) VALUES(BOOK_NUM.NEXTVAL, :1, :2, :3 ), OriginalSql = INSERT INTO noticebook(NUM, NAME , EMAIL, 内容) 值(BOOK_NUM.NEXTVAL, ?, ?, ?), 错误信息 = ORA-01400: NULL ("C##YESMONDAY"."NOTICEBOOK")。

It seems like the query is incorrect, but I can not find what is wrong.似乎查询不正确，但我找不到问题所在。

View Page (main.jsp)查看页面 (main.jsp)

<body>
<h1>Notice Board</h1>
<div id="wrap">
    <div id="wrap_form">
        <form action="mainWritePro.jsp" method="post">
            <table>
                <tr>
                    <td></td>
                    <td><input type="text" name="name" placeholder="TITLE "></td>
                </tr>
                <tr>
                    <td></td>
                    <td><input type="text" name="email" placeholder="EMAIL "></td>
                </tr>
                <tr>
                    <td> </td>
                    <td>
                        <textarea rows="15" cols="50" placeholder="INQUIRY"></textarea>
                    </td>
                </tr>
                <tr class="send">
                    <td colspan="2" align="center"><input type="submit" name="" value="SEND" ></td>
                </tr>
            </table>
        </form>
    </div>
    <ul>
        <li><a href="#">DELETE</a></li>
        <li><a href="#">UPDATE</a></li>
        <li><a href="#">LIST</a></li>
    </ul>
</div>

noticeBoardVO.java公告板VO.java

package edu.kosta.vistorsPrac;

public class noticeBoardVO { // Model
    private int num; private String name, email, contents;
    public noticeBoardVO() {} 

    public int getNum() {   return num; }
    public void setNum(int num) {   this.num = num; }
    public String getName() {   return name; }
    public void setName(String name) {  this.name = name; }
    public String getEmail() {  return email; }
    public void setEmail(String email) {    this.email = email; }
    public String getContents() {   return contents; }
    public void setContents(String contents) {  this.contents = contents; }
}

noticeBoardDAO.java I assume the error occurs here.. noticeBoardDAO.java 我假设错误发生在这里..

public class noticeBoardDAO {// Controller

// DB Connection & Open
public static Connection loadOracleDriver() {
    Connection conn = null;
    try {
        conn = ConnectionHelper.getConnection("oracle");
    } catch (Exception e) {
        e.printStackTrace();
    }
    return conn;
}

// INSERT
public static void insert(Connection conn, noticeBoardVO vo) {
    StringBuffer sb = new StringBuffer();
    PreparedStatement pstmt = null;
    try {
        conn = ConnectionHelper.getConnection("oracle");
        sb.append("INSERT INTO noticebook(NUM, NAME, EMAIL, CONTENTS) ");
        sb.append(" VALUES(BOOK_NUM.NEXTVAL, ?, ?, ?) ");
        System.out.println(sb.toString());
        pstmt = conn.prepareStatement(sb.toString());
        pstmt.setString(1, vo.getName());
        pstmt.setString(2, vo.getEmail());
        pstmt.setString(3, vo.getContents());
        pstmt.executeUpdate(); //

    } catch (Exception e) {
        e.printStackTrace();
    }
}

mainWritePro.jsp (this is displayed after the user click SEND btn) mainWritePro.jsp（用户点击SEND btn后显示）

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert Page</title>
<link rel="stylesheet" type="text/css" href="../css/main.css">
</head>
<%
        request.setCharacterEncoding("utf-8");
%>
<body>

    <jsp:useBean id="vo" class="edu.kosta.vistorsPrac.noticeBoardVO"></jsp:useBean>
    <jsp:setProperty property="*" name="vo" />

    <%
    Connection conn = noticeBoardDAO.loadOracleDriver();
    noticeBoardDAO.insert(conn, vo);
    %>

    <h1>Successfully Inserted !</h1>
    <ul>
        <li><a href="#">DELETE</a></li>
        <li><a href="#">UPDATE</a></li>
        <li><a href="#">LIST</a></li>
    </ul>
</body>
</html>

Answer 1

ORA-01400: cannot insert NULL into ("SCHEMA"."TABLE_NAME"."COLUMN_NAME") ORA-01400: 无法将 NULL 插入 ("SCHEMA"."TABLE_NAME"."COLUMN_NAME")

Your textarea not set name, so i think your contents value is null.您的 textarea 未设置名称，所以我认为您的内容值为 null。

如何在 oracle SQL 开发人员中插入数据

问题描述

1 个解决方案

解决方案1
0 已采纳 2020-05-20 02:12:48

如何在 oracle SQL 开发人员中插入数据

问题描述

1 个解决方案

解决方案1 0 已采纳 2020-05-20 02:12:48

解决方案1
0 已采纳 2020-05-20 02:12:48