PostMapping无法获取数据问题
在使用SpringBoot的PostMapping注解的时候，发现无法获取数据（get方法可行），经过一番查证，发现需要添加新的注解
举例如下
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//接受单个参数，使用RequestParam，并且添加上name属性，保证前后端的参数名称一致 @PostMapping(value = "/users") public RestfulResponse postUser(@RequestParam("id") Integer id, @RequestParam("username") String username, @RequestParam("password") String password) { User user = new User(id, username, password); //User user = new User(1,"tom","123123"); System.out.println(id + "----" + username); restfulResponse = new RestfulResponse(true,200,"查询成功", null); return restfulResponse; } //接受一个实体类，要使用RequestBody 注解 @PostMapping(value = "/getuser") public RestfulResponse postUser1(@RequestBody User user) { restfulResponse = new RestfulResponse(true,200,"查询成功", user); return restfulResponse; } |
Springboot之PostMapping
@PostMapping
映射一个POST请求
Spring MVC新特性
提供了对Restful风格的支持
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@PostMapping(value = "/user/login")//等价于@RequestMapping(value = "/user/login",method = RequestMethod.POST) |
扩展
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@GetMapping，处理get请求 -
@PostMapping，处理post请求 -
@PutMapping，处理put请求 -
@DeleteMapping，处理delete请求
@RequestMapping
RequestMapping是一个用来处理请求地址映射的注解，可用于类或方法上。用于类上，表示类中的所有响应请求的方法都是以该地址作为父路径。
属性
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value：指定请求的实际地址 -
method：指定方法类型，get、post、put、delete等 -
consumes：指定处理请求的提交内容类型，如application/json, text/html; -
produces: 指定返回的内容类型，仅当request请求头中的(Accept)类型中包含该指定类型才返回； -
params： 指定request中必须包含某些参数值是，才让该方法处理。 -
headers： 指定request中必须包含某些指定的header值，才能让该方法处理请求。
value/method示例
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@Controller@RequestMapping("/appointments")public class AppointmentsController { private AppointmentBook appointmentBook; @Autowired public AppointmentsController(AppointmentBook appointmentBook) { this.appointmentBook = appointmentBook; } @RequestMapping(method = RequestMethod.GET) public Map<String, Appointment> get() { return appointmentBook.getAppointmentsForToday(); } @RequestMapping(value="/{day}", method = RequestMethod.GET) public Map<String, Appointment> getForDay(@PathVariable @DateTimeFormat(iso=ISO.DATE) Date day, Model model) { return appointmentBook.getAppointmentsForDay(day); } @RequestMapping(value="/new", method = RequestMethod.GET) public AppointmentForm getNewForm() { return new AppointmentForm(); } @RequestMapping(method = RequestMethod.POST) public String add(@Valid AppointmentForm appointment, BindingResult result) { if (result.hasErrors()) { return "appointments/new"; } appointmentBook.addAppointment(appointment); return "redirect:/appointments"; }} |
value的uri值为以下三类：
A） 可以指定为普通的具体值；
B) 可以指定为含有某变量的一类值(URI Template Patterns with Path Variables)；
C) 可以指定为含正则表达式的一类值( URI Template Patterns with Regular Expressions);
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@RequestMapping(value="/owners/{ownerId}", method=RequestMethod.GET)public String findOwner(@PathVariable String ownerId, Model model) { Owner owner = ownerService.findOwner(ownerId); model.addAttribute("owner", owner); return "displayOwner"; } |
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@RequestMapping("/spring-web/{symbolicName:[a-z-]+}-{version:\d\.\d\.\d}.{extension:\.[a-z]}") public void handle(@PathVariable String version, @PathVariable String extension) { // ... }} |
cousumes的样例：
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@Controller@RequestMapping(value = "/pets", method = RequestMethod.POST, consumes="application/json")public void addPet(@RequestBody Pet pet, Model model) { // implementation omitted} |
params的样例：
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@Controller@RequestMapping("/owners/{ownerId}")public class RelativePathUriTemplateController { @RequestMapping(value = "/pets/{petId}", method = RequestMethod.GET, params="myParam=myValue") public void findPet(@PathVariable String ownerId, @PathVariable String petId, Model model) { // implementation omitted }} |
headers的样例：
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@Controller@RequestMapping("/owners/{ownerId}")public class RelativePathUriTemplateController {@RequestMapping(value = "/pets", method = RequestMethod.GET, headers="Referer=http://www.ifeng.com/") public void findPet(@PathVariable String ownerId, @PathVariable String petId, Model model) { // implementation omitted }} |
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服务器之家。
原文链接：https://blog.csdn.net/weixin_42981803/article/details/107066650
