PostMapping无法获取数据
小乔美哒哒 人气:4PostMapping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
//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
@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
@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);
@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"; }
@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:
@Controller @RequestMapping(value = "/pets", method = RequestMethod.POST, consumes="application/json") public void addPet(@RequestBody Pet pet, Model model) { // implementation omitted }
params的样例:
@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:
@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。
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