SpringMVC关于参数问题案例

方式一：传统request接收

//param01?id=12
@RequestMapping("/param01")
public String param01(HttpServletRequest request){String id = request.getParameter("id");System.out.println("id="+id);return "success";
}

方式二：直接接收参数

//param02?id=12
@RequestMapping("/param02")
public String param02(int id){System.out.println("id="+id);return "success";
}

方式三：数组接收参数

//param03?likes=aa&likes=bb
@RequestMapping("/param03")
public String param03(String[] likes){System.out.println("likes="+ Arrays.toString(likes));return "success";
}

方式四：集合接收参数

//param04?likes=aa&likes=bb
@RequestMapping("/param04")
public String param04(@RequestParam("likes")List<String>likes){System.out.println("likes="+ likes);return "success";
}

方式五：日期接收参数

方法一：字符串接收

//param05?date=2024-08-27
@RequestMapping("/param05")
public String param05(String date) throws ParseException {System.out.println("date="+ date);//将字符串转化为日期SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date date1 = sdf.parse(date);System.out.println(date1);return "success";
}

方法二：形式参数直接接收

这种方式对日期有严格要求，yyyy/MM/dd

//param15?date=2024/08/27
@RequestMapping("/param15")
public String param15(Date date){System.out.println("date="+ date);//将字符串转化为日期return "success";
}

方法三：初始化绑定

//param25?date=2024/08/27
@InitBinder
public void initData(WebDataBinder wdb){wdb.registerCustomEditor(Date.class,new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));
}
@RequestMapping("/param25")
public String param25(Date date){System.out.println("date="+ date);//将字符串转化为日期return "success";
}

方式六：RestFull风格传参

//param06/name
@RequestMapping("/param06/{name}")
public String param06(@PathVariable String name){System.out.println("name="+ name);return "success";
}

方式七：对象传参

@RequestMapping("/param07")
public String param07(User user){System.out.println("user="+ user);return "success";
}