java - out.print() 不适用于 jsp 方法

Question

out object 显示错误，例如找不到符号。尝试了很多方法来修复错误。但仍然显示错误

<%@ page import="java.sql.*" %>
<%!
    void loadBuilding() throws Exception {
        Class.forName("com.mysql.jdbc.Driver");
        Connection con = DriverManager.getConnection("jdbc:mysql://localhost/crm", "root", "");
        Statement st = con.createStatement();
        ResultSet rs = st.executeQuery("select name from building where 1");
        rs.last();
        int count = rs.getRow();
        if (count > 0) {
            rs.beforeFirst();
            while (rs.next()) {
                out.print("<script>passName('" + rs.getString(1) + "');</script>");
            }
        } else {
            out.print("No Buildings Added Yet");
        }
    }
%>

<%
    loadBuilding();
%>

Answer 1

根据您在 out 上调用的方法，您可能需要 out 成为一个 PrintWriter，其输出写入 >此 JSP 生成的响应的 OutputStream。

添加:

PrintWriter out = new PrintWriter (response.getOutputStream ());