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分享List接口版本不兼容？
我在学jsp时遇到一个问题 自己总是解决不了 问题如下 望指教：
private void tree(List<Article> articles, Connection conn, int id, int grade) {
String sql = "select * from article where pid = " + id;
Statement stmt = DB.createStmt(conn);
ResultSet rs = DB.executeQuery(stmt, sql);
try {
while(rs.next()) {
Article a = new Article();
a.initFromRs(rs);
a.setGrade(grade);
articles.add(a);
if(!a.isLeaf()) {
tree(articles, conn, a.getId(), grade + 1);
}
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DB.close(rs);
DB.close(stmt);
}
}
%>
<%
List<Article> articles = new ArrayList<Article>();
Connection conn = DB.getConn();
tree(articles, conn, 0, 0);
DB.close(conn);
%>
List接口总显示这种用法仅在1.5使用 而我的jdk是1.6 不知该怎样转换
private void tree(List<Article> articles, Connection conn, int id, int grade) {
String sql = "select * from article where pid = " + id;
Statement stmt = DB.createStmt(conn);
ResultSet rs = DB.executeQuery(stmt, sql);
try {
while(rs.next()) {
Article a = new Article();
a.initFromRs(rs);
a.setGrade(grade);
articles.add(a);
if(!a.isLeaf()) {
tree(articles, conn, a.getId(), grade + 1);
}
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DB.close(rs);
DB.close(stmt);
}
}
%>
<%
List<Article> articles = new ArrayList<Article>();
Connection conn = DB.getConn();
tree(articles, conn, 0, 0);
DB.close(conn);
%>
List接口总显示这种用法仅在1.5使用 而我的jdk是1.6 不知该怎样转换
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