<%@ page pageEncoding="GBK"%>
<%@ page import="java.sql.*, com.jun.bbs.*, java.util.*, java.io.*"%>
<%!
private void tree(Set <Article> articles, Connection conn, int id, int grade) {
String sql = "select * from article where pid = " + id;
Statement stmt = DB.getStmt(conn);
ResultSet rs = DB.executeQuery(stmt, sql);
try{
while(rs.next()) {
Article article = new Article();
article.setId(rs.getInt("id"));
article.setPid(rs.getInt("pid"));
article.setRootid(rs.getInt("rootid"));
article.setTitle(rs.getString("title"));
article.setLeaf(rs.getInt("leaf") == 0? true:false);
}
} catch(SQLExpection e) {
e.printStackTrace();
}
}
%>
<%
List <Article> articles = new ArrayList <Article>();
Connection conn = DB.getConn();
tree(articles, conn, 0, 0);
DB.close(conn);
%>
写了一半遇到错了，找了半天没找到，各位帮忙看下，在new List是报错，说List不是个类，catch那也报错。。。
lg
List 和 Set 不是一个体系的，不能转换。
改改
private void tree(Collection <Article> articles, Connection conn, int id, int grade)
{{
