java 输出js 脚本

方法一

        response.setHeader("Content-Type", "text/html; charset=UTF-8");
        response.getWriter().write("");
        response.getWriter().flush();
        response.getWriter().close();	



方法二

        response.setContentType("text/html;charset=UTF-8");
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Cache-Control", "no-cache");
        PrintWriter out = response.getWriter();
        out.println("");
        out.flush();
        out.close();
        out = null;
        return null;




小技巧：
   
     java后台调用js代码
        response.setContentType("text/html");
        response.setCharacterEncoding("utf-8");
        String call_back = "";
        response.getWriter().write(call_back);
        response.getWriter().flush();
        response.getWriter().close();


     html前端调用函数（在同一个html中写两个script  后台调用不同的script函数 需要加上 parent.openStaticPopup）