alert弹出框乱码

String str = "^[0-9A-Za-z]{1-10}";
        String username = request.getParameter("username");
        if (username == str) {
            user.setUsername("username");
        }else {
            response.setCharacterEncoding("utf-8");
            PrintWriter out = response.getWriter();
            out.print
            ("<html>"
                +"<head>"
                    +"<meta http-equiv='Content-Type' content='text/html; charset=utf-8'/>"
                +"</head>"
                +"<script charset='utf-8' language='JavaScript' type='text/javascript'>alert('昵称格式错误,请重新输入');"
                +"window.location='register.jsp'</script>"
            +"</html>");
            out.flush();
            out.close();

        }

需要把html及js文件都设置为utf-8

package org.example.web; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.example.mapper.customerMapper; import org.example.pojo.customerPojo; import org.example.service.customerService; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; @WebServlet("/loginServlet") public class loginServlet extends HttpServlet { private customerService service = new customerService(); @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.接受用户名的密码 String c_username = request.getParameter("c_username"); String c_password = request.getParameter("c_password"); customerPojo customer = service.login(c_username, c_password); //避免出现乱码,设置字符输入流的编码,设置的字符集要和页面保持一致 response.setContentType("text/html;charset=utf-8"); PrintWriter writer = response.getWriter(); //7.判断user释放为null if (customer != null){ HttpSession session = request.getSession(); session.setAttribute("customer",customer); session.setAttribute("c_username",c_username); String contextPath = request.getContextPath(); response.sendRedirect("/花店.html"); }else { //登陆失败 writer.write("<script>window.alert('用户名或者密码错误')</script>"); writer.write("<script>window.location.href='login.jsp'</script>"); } } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //在dopost()里面调用doget()方法 //不管发过来是什么请求,最后都转向do() this.doGet(request, response); } }
06-08
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