我尝试在网上寻求帮助以解决我的问题，但无济于事。我希望将verify[]转换为int，以便在查询中对其进行处理。
verified列的数据类型为string
staff_id列的数据类型为autonumber
我收到错误
java.sql.SQLException：[Microsoft] [ODBC Microsoft Access驱动程序]条件表达式中的数据类型不匹配。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Verification of Staff Accounts</title>
</head>
<body>
<div align="center">
<%-- Imports --%>
<%@ page import="java.sql.*"%>
<%@ page import="java.util.*"%>
<%-- HTTP header --%>
<%response.addHeader("Cache-Control","no-cache");
response.addHeader("Pragma","no-cache");
response.addHeader("Expires","0");
%>
<%-- Retrieving Staff Accounts - Reading --%>
<%
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String conURL= "jdbc:odbc:HOD_DATA";
Connection con = DriverManager.getConnection(conURL);
Statement st = con.createStatement();
String query = "select staff_id, username, password, user_group, verified from Staff";
ResultSet rs = st.executeQuery(query);
%>
<form action="VerifyStaffAuth.jsp">
<table width="200" border="1">
<tr>
<td>Staff_ID</td>
<td>Username</td>
<td>Password</td>
<td>User Group</td>
<td>Verified?</td>
<td>Verify/Un-verify</td>
</tr>
<%
while(rs.next()){
int staff = rs.getInt("staff_id");
%>
<tr>
<td><%= staff %></td>
<td><%= rs.getString("username") %></td>
<td><%= rs.getString("password") %></td>
<td><%= rs.getString("user_group") %></td>
<td><%= rs.getString("verified") %></td>
<td><label>
<input type="checkbox" name="CheckboxGroup" value="<%= staff %>">
</label></td>
</tr>
<%
}
rs.close();
st.close();
con.close();
}
catch(Exception e){
out.println(e);
}
%>
</table>
<input type="submit" VALUE="submit">
</form>
</div>
</body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title></title>
</head>
<body>
<%-- Imports --%>
<%@ page import="java.sql.*"%>
<%@ page import="java.util.*"%>
<%-- HTTP header --%>
<%response.addHeader("Cache-Control","no-cache");
response.addHeader("Pragma","no-cache");
response.addHeader("Expires","0"); %>
<% String[] verify = request.getParameterValues("CheckboxGroup");
int[] verify2 = new int[verify.length];
for(int i=0;i<verify.length;i++){
verify2[i]=Integer.parseInt(verify[i]);
}
if(verify != null){
for(int i=0; i<verify.length; i++){
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String conURL= "jdbc:odbc:HOD_DATA";
Connection con = DriverManager.getConnection(conURL);
Statement st = con.createStatement();
int status = st.executeUpdate("update Staff set verified = 'yes' where Staff_id = '"+verify[i]+"'");
if(status>0){
//response.sendRedirect("SuccessfulReg1.html");
}
else{
//out.println("Update unsuccessful");
}
st.close();
con.close();
}
catch(Exception e){
out.println(e);
}
}
}
%>
</body>
</html>
答案 0 :(得分：0)
将您的UPDATE查询更改为
st.executeUpdate("update Staff set verified = 'yes' where Staff_id = " + verify[i]);
由于staff_id列的数据类型为autonumber，因此不应在引号中指定其值，因为它本质上是数字。
我还建议您使用SQL IN子句并仅触发一个UPDATE而不是多次触发，每个staff_id值一个。
UPDATE子句的IN查询应该类似于
UPDATE staff SET verified = 'yes' WHERE staff_id IN (1, 2, 3)
使用Arrays.toString()将逗号分隔的字符串作为
String inValues = Arrays.toString(verify); // "[1, 2, 3]"
inValues = inValues.substring(1, inValues.length() - 1)); // "1, 2, 3"