很久不写 Servlet 有大佬知道这是啥问题嘛

[hemingyang]

这是过滤器方法

public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest)req; HttpServletResponse response = (HttpServletResponse)resp; HttpSession session = request.getSession(); String path = request.getRequestURI(); if(path.contains("login.jsp") || path.contains("/login") ||path.contains("register.jsp") ||path.contains("register") || path.contains("/DrawValidateCode") || path.contains("/layui") || path.contains("/image")){ chain.doFilter(req, resp); //登录页面，登录请求，验证码请求，前端资源和图片一律放行 }else{ String username = (String)session.getAttribute("username"); if (username == null){ //用户不存在一律重定向到登录页 response.sendRedirect(request.getContextPath() + "/login.jsp"); }else { chain.doFilter(req, resp); } } }

这个注册 @WebServlet(urlPatterns = "/addUser") public class RegisterServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    System.out.printf("1111111111111");
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    req.setCharacterEncoding("utf-8");
    String jsonRegistration = RequestUtil.getRequestBody(req);
    Gson gson = new Gson();
    JsonObject jsonObject = new JsonParser().parse(jsonRegistration).getAsJsonObject();

    String username = jsonObject.get("username").getAsString();
    String password = jsonObject.get("password").getAsString();

    resp.setContentType("application/json");
    BaseResponse<Integer> baseResponse = new BaseResponse<Integer>();

    boolean registrationSuccess = AdminDao.insertAdministrator(username, password);

    if (registrationSuccess) {
        baseResponse.setCode(200);
        baseResponse.setMsg("注册成功");
        resp.sendRedirect(req.getContextPath() + "/login.jsp");
    } else {
        baseResponse.setCode(500);
        baseResponse.setMsg("注册失败，请重试");
    }

    PrintWriter out = resp.getWriter();
    out.print(gson.toJson(baseResponse));
    out.flush();
    out.close();
}

}

前端就 layui' <script> layui.use(['form'], function(){ var form = layui.form;

    form.on('submit(registrationForm)', function(data){
        var formData = {
            username: data.field.username,
            password: data.field.password
        };
        $.ajax({
            url: '/addUser',
            type: 'POST',
            data: JSON.stringify(formData),
            success: function(res) {
                if(res.code === 200) {
                    layer.msg('注册成功！');
                    window.location.href = '/login.jsp';
                } else {
                    layer.msg('注册失败！');
                }
            },
            error: function(error) {
                layer.msg('注册请求失败：' + error.statusText);
            }
        });

        return false;
    });
});

</script>

就是进不了这个放 addUser 打断也调试了看不出问题

[mgzu]

github 整个 demo 先，这没法看

[hemingyang]

@mgzu https://github.com/hemingyang/studentManagement/tree/main/src/main

[hemingyang]

@mgzu 我上传了，大佬看看

[fiveStarLaoliang]

写惯了 springboot 项目, 现在遇到一个 jsp 的项目, 直接懵逼了, 都忘了怎么跑起来了

[hemingyang]

@fiveStarLaoliang 我也是看得头大，哈哈，用 idea 摸索了会才运行起来

[undeflife]

不确定是不是这个原因
https://stackoverflow.com/questions/26089902/webservlet-annotation-doesnt-work-with-tomcat-8

web-app version 要大于 3

[hemingyang]

@undeflife 不是这个原因，我就新加了注册方法，其实其他请求都正常，我怀疑
https://github.com/hemingyang/studentManagement/blob/main/src/main/java/com/zcx/studentManagement/filter/LoginFilter.java
这个过滤器的原因

[fiveStarLaoliang]

你把 path 打印一下呗, 看看请求的具体路径是什么

[taogen]

你请求的路径是什么?有没有加 Context Path ？

request URI = Context Path + Servlet Path + Path Info + Query String

e.g. http://localhost:8080/myproject/myservlet/remove?id=1

- Context Path: `/myproject`
- Servlet Path: `/myservlet`
- Path Info: `/remove`
- Query String: `?id=1`

[chanchan]

看响应 404 ？估计路径不对

[zoharSoul]

要不咱还是整个 spring 吧

[siweipancc]

哇塞, 够原始, 我喜欢

[javak]

@hemingyang 这 demo 给的太不负责了啊。 整成 maven 或者 gradle 或者 ant 的项目，把依赖弄齐，然后说明怎么跑起来了。直接丢源码，让我们自己去补全依赖。

[ikas]

jdk17 加 tomcat8.5 测试了,可以访问到 addUser ,get 与 post 都可以

[hemingyang]

@javak https://github.com/hemingyang/studentManagement-1 重新上传了

[hemingyang]

@ikas 我就想加个注册功能不知道为啥就是进不了方法

[xuanbg]

后端方法进不去可以肯定是路径的问题，盲猜是文件没有访问权限

[hemingyang]

@xuanbg https://mjj.today/i/8TMDkO 这是请到后台的信息

[hemingyang]

解决了 直接改成了

<form class="layui-form" method="post" id="registrationForm" action="/addUser"> 原生的 action
没有 layui
<script>
layui.use(['form'], function(){
var form = layui.form;
form.on('submit(registrationForm)', function(data){
var formData = {
username: data.field.username,
password: data.field.password
};
$.ajax({
url: '/addUser',
type: 'POST',
data: JSON.stringify(formData),
success: function(res) {
if(res.code === 200) {
layer.msg('注册成功！');
window.location.href = '/login.jsp';
} else {
layer.msg('注册失败！');
}
},
error: function(error) {
layer.msg('注册请求失败：' + error.statusText);
}
});

return false;
});
});
</script>