: if(rs1.next()){ : while(rs1.next()){ : String SQL2 = "SELECT "+session.getAttribute("Role")+" FROM lvl : WHERE 功能 = '"+rs1.getString(2)+"'"; http://java.sun.com/j2se/1.4.2/docs/api/java/sql/ResultSet.html#next() Moves the cursor down one row from its current position. A ResultSet cursor is initially positioned before the first row; the first call to the method next makes the first row the current row; the second call makes the second row the current row, and so on. 你多 move 了 还有您的痛苦来自於用了难用的方法 用 Prepared Statement 会轻松且安全一点 http://java.sun.com/docs/books/tutorial/jdbc/basics/prepared.html --

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