IT修真院·坑乎 | Java(后端),CSS(前端),JavaScript(前端),PM(产品经理),UI(交互设计),QA(测试),Android(安卓APP),iOS(苹果APP),OP(运维),Python(后端)日常在线问答学习平台

该问题已被官方收录

jsp中from表单input输入值传递到后台的问题

0

1

SSM

class="cursor-pointer"> 详细描述

获取的传值为String “{nowpage}”，而不是期待的input输入的内容 “5”。

没有报错，只是报的[WARN]。
后台无反应。
*@PathVariable("nowpage")int nowpage从url路径里（@RequestMapping(value = "/pages/{nowpage}/{pagesize}",method = RequestMethod.POST)）获取值的问题。
如果有师兄知道可能的错误请指教一下。（可能是配置的问题或者说是传递方式的问题，或者使用方法有问题）
1.在使用@PathVariable("nowpage")int nowpage的情况下，jsp需要用什么方式获取到input输入的值然后写入action或者url里（不使用js）。使“/page/{nowpage}”访问的时候变成“/page/5”（5是input输入的参数）
2.后台会提示下面警告：
[WARN]-[org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver] Failed to bind request element: org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'int'; nested exception is java.lang.NumberFormatException: For input string: "{nowpage}"
错误代码
jsp：
HTTP Status 400 – Bad Request
error：
Failed to convert value of type 'java.lang.String' to required type 'int'; nested exception is java.lang.NumberFormatException: For input string: "{nowpage}"

这里是字符串"{nowpage}" 用String接收也是"{nowpage}"，而不是期待的字符串类型 “5”

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

Controller：
  @RequestMapping(value = {"/pages/{nowpage}/{pagesize}","{/pages/{nowpage}}","{/pages}"},method = RequestMethod.POST)
    public String selectByPage(@PathVariable("nowpage")int nowpage,@PathVariable(value = "pagesize", required = false)int pagesize,Model model){……}

jsp：
<form class="navbar-form navbar-left" role="search"  action="/ptt/pages/{nowpage}/{pagesize}" id="pagefrom" name="pagefrom" method="POST">
        <div class="form-group">
            <input type="hidden" name="_method" value="POST"/>
            <input type="text" class="form-control" name="nowpage" id="nowpage"  />
            <input type="text" class="form-control" name="pagesize" id="pagesize"  />
        </div>
        <button type="submit" class="button btn-default" form="pagefrom" >page</button>
    </form>

该问题已被官方收录

Mybatis中的输入映射和输出映射

1

mybatis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

微信网页授权开发，获取不到code值，

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

连接不上数据库

1

spring

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/learn?useSSL=false&characterEncoding=UTF-8
username=root
password=qq798256289

该问题已被官方收录

nginx配置域名为www.yuancheng.com时，提示域名备案

2

1

Nginx

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

quazt加载数据库错误

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

无法调用另一个类

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

公司的代码自动生成出错

1

代码生成

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

配置nginx反向代理

0

1

SSM

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

项目上传服务器可以正常运行，但是出现了一个很奇怪的bug

2

1

会话管理

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

user  nobody;
worker_processes  1;
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
error_log  logs/error.log  info;
pid        logs/nginx.pid;
events {
   worker_connections  1024;
}
http {
   include       mime.types;
   default_type  application/octet-stream;
   log_format  main '$remote_addr - $remote_user [$time_local] "$request" '
                     '$status $body_bytes_sent "$http_referer" '
                     '"$http_user_agent" "$http_x_forwarded_for"'
  '$connection $upstream_addr'
  ' $upstream_response_time $request_time "$request_time" ';
   access_log  logs/access.log  main;
   sendfile        on;
   #tcp_nopush     on;
   #keepalive_timeout  0;
   keepalive_timeout  65;
   # http_proxy
   proxy_buffer_size 128k;
   proxy_buffers 32 128k;
   proxy_busy_buffers_size 128k;
   gzip  on;
   upstream web{
       server 139.199.13.81:8081;
       server 139.199.13.81:8091;
       hash $request_uri;
   }
   server {
       listen      80;
       server_name  139.199.13.81;
       #charset koi8-r;
       location /static/ {
           root  /usr/local/nginx/Tiles;
       }
       access_log  logs/access.log  main;
       location / {
           root   html;
           index  index.html index.htm;
           proxy_set_header Host $host;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header REMOTE-HOST $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           proxy_pass http://tomcats;
       }
   }
       #error_page  404              /404.html;
       # redirect server error pages to the static page /50x.html
       #
         error_page   500 502 503 504  /50x.html;
        location = /50x.html {
           root   html;
        }

loading