以下是观点:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets">
<h:head>
<title>Books </title>
</h:head>
<h:body>
<h:link value="Add Books" outcome="addBook.xhtml"></h:link>
<table border="1">
<tr>
<td><b>ID</b> </td>
<td><b>Title</b> </td>
<td><b>Year</b> </td>
<td><b>ISBN</b> </td>
<td><b>Total</b> </td>
<td><b>Remaining</b></td>
</tr>
<ui:repeat value="#{booksController.fetch_book_data}" var="r">
<tr>
<h:form>
<td><h:inputText value="#{r.id}"></h:inputText></td>
<td><h:inputText value="#{r.title}"></h:inputText> </td>
<td><h:inputText value="#{r.year}"></h:inputText> </td>
<td><h:inputText value="#{r.isbn}"></h:inputText> </td>
<td><h:inputText value="#{r.total}"></h:inputText> </td>
<td><h:inputText value="#{r.remaining}"></h:inputText></td>
<td><h:commandButton value="update record" action="#{book.setUpdateBook_data()}"/></td>
</h:form>
</tr>
</ui:repeat>
</table>
</h:body>
</html>
View
将数据提交到setUpdateBook_data()
,这是其定义:
public String setUpdateBook_data() throws SQLException {
this.setRemaining(this.getTotal());
Statement stmt = con.createStatement();
String query = "UPDATE books SET title=? , year123=? , isbn=? , total=? , remaining=? where id=?";
PreparedStatement preparedStatement = con.prepareStatement(query);
preparedStatement.setString(1, this.getTitle());
preparedStatement.setString(2, this.getYear());
preparedStatement.setString(3, this.getIsbn());
preparedStatement.setInt(4, this.getTotal());
preparedStatement.setInt(5, this.getRemaining());
preparedStatement.setInt(6, this.getId());
preparedStatement.executeUpdate();
preparedStatement.close();
stmt.close();
return "success";
}
提交数据时,应用程序显示没有错误,但记录未更新。我错过了什么?
我已经直接从Netbeans测试了以下查询,它在那里工作但不在这里。
UPDATE books SET title='qqq' , year123='3009' , isbn='123456asdfgh' , total=10 , remaining=5 where id=5
答案 0 :(得分:1)
如果没有错误,但执行 executeUpdate 后没有数据,由于禁用了autoCommit选项,您可能没有提交事务。
尝试执行提交,如下所示:
preparedStatement.executeUpdate();
con.commit();
preparedStatement.close();
注意到你正试图从上下文中访问某些内容:
在这里看到这个解释,这应该解释你需要知道的每一个: https://stackoverflow.com/a/3791736/4956256