如何在拦截器中获取url路径里面@PathVariable的参数值

目录

• 在拦截器中获取url路径里@PathVariable参数值
• 解决办法
• 示例接口
• 完整示例
• spring @PathVariable：请求路径url 上有变量值，通过@PathVariable获取
• 示例：

在拦截器中获取url路径里@PathVariable参数值

解决办法

Map pathVariables = (Map) request.getAttribute(
HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
String classId = (String)pathVariables.get("classId");

示例接口

    // 获取某个班级下面的学生列表
    @RequestMapping("/classes/{classId}/students")
    public String list(@PathVariable String classId){
        return "学生列表";
    }

完整示例

package com.example.demo;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.ModelAndView;
import java.util.Map;
public class SpringMVCInterceptor implements HandlerInterceptor {
 @Override
 public boolean preHandle(HttpServletRequest request,
   HttpServletResponse response, Object handler) throws Exception {
  Map pathVariables = (Map) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
  String chatbotId = (String)pathVariables.get("classId");
  System.out.println("classId: " + classId);
  if ("1234".equals(classId))
   return true;
  return false;
 } 

 @Override
 public void postHandle(HttpServletRequest request,
   HttpServletResponse response, Object handler,
   ModelAndView modelAndView) throws Exception {
  // TODO Auto-generated method stub
 }
 @Override
 public void afterCompletion(HttpServletRequest request,
   HttpServletResponse response, Object handler, Exception ex)
 throws Exception {
  // TODO Auto-generated method stub
 }
}

package com.example.demo;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@Configuration
public class MvcInterceptorConfig extends WebMvcConfigurationSupport{
    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new SpringMVCInterceptor()).addPathPatterns("/chatbot/**");
        super.addInterceptors(registry);
    }
}

spring @PathVariable：请求路径url 上有变量值，通过@PathVariable获取

请求路径url 上有个变量值，可以通过@PathVariable来获取

示例：

id为变量值：

@RequestMapping(value = "/page/{id}", method = RequestMethod.GET)     

Tool tool = new Tool();
tool.setUrls(new String[]{"finance/account/loanDownExcel/cur","finance/account/loanDownExcel/all"});

@RequestMapping("accountlog/loanDownExcel/{type}")
public void exportAccountLogExcel(@PathVariable("type")  String type)throws Exception {}

或者是

public void exportAccountLogExcel(@PathVariable   String type)throws Exception {}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。