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request.setAttribute("message", "用户名" + user + "已经被占用,请重新填写!");
request.getRequestDispatcher("/newUser.jsp").forward(request, response);
<%
request.setCharacterEncoding("UTF-8");
Object msg=request.getAttribute("message");
if(msg!=null){
out.print("<br>");
out.print(msg);
out.print("<br>");
out.print("<br>");
}
%>
request.setAttribute("message", "用户名" + user + "已经被占用,请重新填写!");
request.getRequestDispatcher("/newUser.jsp").forward(request, response);
//输出如果用utf-8, 应改成:
request.setAttribute("message", "用户名" + new String(user.getBytes("utf-8"), "utf-8") + "已经被占用,请重新填写!");
request.getRequestDispatcher("/newUser.jsp").forward(request, response);
String msg = new String("用户名".getBytes("utf-8"), "utf-8") + user +
new String("已经被占用,请重新填写!".getBytes("utf-8"), "utf-8");
request.setAttribute("message", msg);
request.getRequestDispatcher("/newUser.jsp").forward(request, response);
除了“名”这个字之外无乱码
String msg = new String("用户名".getBytes( ), "utf-8") + user +
new String("已经被占用,请重新填写!".getBytes( ), "utf-8");
request.setAttribute("message", msg);
request.getRequestDispatcher("/newUser.jsp").forward(request, response);
直接传user,在jsp页面拼串----->无乱码
String str = "用户名称";
String b = null;
b = new String(str.getBytes("utf-8"), "utf-8");