URL Address mapping configuration

@RequestMapping

Through annotation @RequestMapping Bind the request address to the method , You can declare... At the class level and method level . Class level annotations are responsible for mapping a specific request path to a controller , take url Bind to class ; Mapping can be refined through method level annotations , Be able to map a specific request path to a specific method , take url Bind to the method of the class .

Map single URL

@RequestMapping("") or @RequestMapping(value="")

package com.xxxx.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

/** * URL Address mapping configuration  * @RequestMapping(" Mapping address ") *  Declaration on method , Indicates that the request path is bound to the method in the class  *  Declare at the class level , Represents the path and class binding of the request  * *  Common forms  *  Method path  / Method path  *  Class path + Method path  / Class path / Method path  */
@Controller
public class UrlController {
    

    /** * @RequestMapping  Declare on the method , Map single  URL *  Access address ：（ If there is a class path that needs to be written in front of the method path ） * http://ip:port/springmvc01/url01 * @return */
    @RequestMapping("url01")
    public ModelAndView url01(){
    
        ModelAndView mv = new ModelAndView();
        // Set up model data 
        mv.addObject("hello","url01");
        mv.setViewName("hello");
        return mv;
    }

    /** *  Whether to add... At the beginning of the path   Slash "/"  All possible  * @RequestMapping("/ Request path ")  And  @RequestMapping(" Request path ") All possible  *  Advice and , Such as ：@RequestMapping("/url02") *  Access address ：（ If there is a class path that needs to be written in front of the method path ） * http://ip:port/springmvc01/url02 * @return */
    @RequestMapping("/url02")
    public ModelAndView url02(){
    
        ModelAndView mv = new ModelAndView();
        // Set up model data 
        mv.addObject("hello","url02");
        mv.setViewName("hello");
        return mv;
    }

}

Map multiple URL

@RequestMapping({"",""}) or @RequestMapping(value={"",""})

package com.xxxx.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class UrlController {
    

    /** * @RequestMapping  Declare on the method , Map multiple  URL *  Support one method to bind multiple  url  The operation of  *  Access address ：（ If there is a class path that needs to be written in front of the method path ） * http://ip:port/springmvc01/url03_01 * http://ip:port/springmvc01/url03_02 * @return */

    @RequestMapping({
    "/url03_01","/url03_02"})
    // @RequestMapping(value = {"/url03_01","/url03_02"})
    public ModelAndView test03(){
    
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("hello","url03");
        modelAndView.setViewName("hello");
        return modelAndView;
    }

}

mapping URL On the controller

For classes , This address is the parent path of all methods in the class that respond to requests .

package com.xxxx.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("url")
public class UrlController {
    

	/** * @RequestMapping  Declare on the class , All methods in the class take this address as the parent path  *  Declaration level ： *  Class level  +  The method level  （/ Class path / Method path ） *  Access address ： http://ip:port/springmvc/url/url04 * @return */
    @RequestMapping("/url04")
    public ModelAndView url04(){
    
        ModelAndView mv = new ModelAndView();
        // Set up model data 
        mv.addObject("hello","url04");
        mv.setViewName("hello");
        return mv;
    }
    
}

Set up URL Request mode of mapping

The request method is not set by default , stay HTTP The most common request method in the request is GET、POST, There are other ways , Such as ：DELETE、PUT、HEAD etc. .

Can pass method Property to set the supported request method , Such as method=RequestMethod.POST; Such as setting multiple request modes , Enclose with curly braces , Separated by commas .

package com.xxxx.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("url")
public class UrlController {
    

    /** *  Set request method  *  adopt  method  The request method supported by the property setting method , Default  GET Request and  POST All requests are supported . *  Set the request mode , You can only request . *  Access address ：（ Only use POST Request access ） * http://ip:port/springmvc01/url/url05 * @return */
    @RequestMapping(value = "url05",method = RequestMethod.POST)
    public ModelAndView url05(){
    
        ModelAndView mv = new ModelAndView();
        // Set up model data 
        mv.addObject("hello","url05");
        mv.setViewName("hello");
        return mv;
    }

}

Browser defaults to Get Request mode .

PostMan test Get request

PostMan test Post request

Map by parameter name URL

package com.xxxx.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("url")
public class UrlController {
    

    /** *  Access by parameter name  *  Access through parameters  *  Access address ：http://ip:port/springmvc01/url?url06 * @return */
    @RequestMapping(params = "url06")
    public ModelAndView url06(){
    
        ModelAndView mv = new ModelAndView();
        // Set up model data 
        mv.addObject("hello","url06");
        mv.setViewName("hello");
        return mv;
    }

}