spring 获取url参数

1. usl格式： http://localhost:8080/contact/delete/3

java代码

    @RequestMapping(value="/delete/{id}")
    public Map<String,Object> delete(@PathVariable("id") Integer id){
          boolean result = contactService.deleteContactById(id);

也可以这样

@RequestMapping(value="/delete/{id}")
    public Map<String,Object> delete(@ModelAttribute("id") Integer id){

2.url格式：http://localhost:8080/contact/delete?id=3

java代码

@RequestMapping(value="/delete")
    public Map<String,Object> delete(@RequestParam("id") Integer id){
          boolean result = contactService.deleteContactById(id);

也可以这样

@RequestMapping(value="/delete")
    public Map<String,Object> delete(@ModelAttribute("id") Integer id){