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
@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
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://HdhCmsTestifeng测试数据/" ) 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。
原文链接：https://blog.csdn.net/weixin_42981803/article/details/107066650
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