>我就是不能。4 天来，我一直在努力使用与 GET 不同的方法发送数据 ajax，我不建议。我在 Spring Boot 中创建了一个项目。我创建了一个映射地址控制器
@PutMapping(value = "/changeEmail", consumes = MediaType.APPLICATION_JSON_VALUE)
public boolean changeEmail(
@RequestBody ChangeEmailDTO changeEmailDTO
) {
System.out.println("email: " + changeEmailDTO.getEmail());
return true;
}
该控制器应该接受ajaxa发送的电子邮件地址
function changeEmail() {
console.log("Event");
$.ajax({
type: 'PUT',
url: '/changeEmail',
data: {
email: JSON.strgify($('#email').val())
},
success: function (result) {
console.log('function');
}
});
}
但是，唯一的效果是在控制台中使我崩溃
PUT http://localhost:8080/signIn net::ERR_TOO_MANY_REDIRECTS
send @ jquery-3.2.1.min.js:4
ajax @ jquery-3.2.1.min.js:4
changeEmail @ settings.js:58
submitHandler @ settings.js:52
d @ jquery.validate.min.js:4
(anonymous) @ jquery.validate.min.js:4
dispatch @ jquery-3.2.1.min.js:3
q.handle @ jquery-3.2.1.min.js:3
DTO只有一个字段
public class ChangeEmailDTO {
@IsValidEmail
@ExistsEmail(ifExistsReturn = false)
@Getter @Setter private String email;
}
尝试通过 ajax 发送数据后，它会将我发送到错误控制器
@Controller
public class PageNotFoundController implements ErrorController{
@RequestMapping("/error")
public ModelAndView showPageError() {
return new ModelAndView("redirect:/signIn");
}
@Override
public String getErrorPath() {
return "/error";
}
}
使用浏览器工具发送和接收的屏幕：https://zapodaj.net/f1b8ed0b2a16b.png.html 正如我所提到的，控制器只能正确地从 ajax 获取 GET 查询。每次它打开错误控制器时。 此外，他们说，如果我想直接从表单发送数据，那么任何查询都没有问题。 这个 ajax 转移了什么，我不知道。
此外，当 Spring Security 中禁用 csrf(( 时，会收到此类日志
2017-07-26 21:07:15.465 DEBUG 3760 --- [nio-8080-exec-6] o.s.web.servlet.DispatcherServlet : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2017-07-26 21:07:15.465 DEBUG 3760 --- [nio-8080-exec-6] o.s.web.servlet.DispatcherServlet : Successfully completed request
2017-07-26 21:07:15.499 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet : DispatcherServlet with name 'dispatcherServlet' processing PUT request for [/changeEmail]
2017-07-26 21:07:15.501 DEBUG 3760 --- [nio-8080-exec-7] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /changeEmail
2017-07-26 21:07:15.505 DEBUG 3760 --- [nio-8080-exec-7] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported
2017-07-26 21:07:15.506 DEBUG 3760 --- [nio-8080-exec-7] .w.s.m.a.ResponseStatusExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported
2017-07-26 21:07:15.506 DEBUG 3760 --- [nio-8080-exec-7] .w.s.m.s.DefaultHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported
2017-07-26 21:07:15.508 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2017-07-26 21:07:15.508 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet : Successfully completed request
2017-07-26 21:07:15.509 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet : DispatcherServlet with name 'dispatcherServlet' processing PUT request for [/error]
2017-07-26 21:07:15.510 DEBUG 3760 --- [nio-8080-exec-7] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /error
2017-07-26 21:07:15.511 DEBUG 3760 --- [nio-8080-exec-7] s.w.s.m.m.a.RequestMappingHandlerMapping : Returning handler method [public org.springframework.web.servlet.ModelAndView com.movie.database.app.controller.error.PageNotFoundController.showPageError()]
2017-07-26 21:07:15.526 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.cors.DefaultCorsProcessor : Skip CORS processing: request is from same origin
here
2017-07-26 21:07:15.527 DEBUG 3760 --- [nio-8080-exec-7] o.s.w.s.v.ContentNegotiatingViewResolver : Requested media types are [*/*] based on Accept header types and producible media types [*/*])
2017-07-26 21:07:15.528 DEBUG 3760 --- [nio-8080-exec-7] o.s.w.servlet.view.BeanNameViewResolver : No matching bean found for view name 'redirect:/signIn'
2017-07-26 21:07:15.528 DEBUG 3760 --- [nio-8080-exec-7] o.s.w.s.v.ContentNegotiatingViewResolver : Returning redirect view [org.springframework.web.servlet.view.RedirectView: unnamed; URL [/signIn]]
2017-07-26 21:07:15.528 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet : Rendering view [org.springframework.web.servlet.view.RedirectView: unnamed; URL [/signIn]] in DispatcherServlet with name 'dispatcherServlet'
2017-07-26 21:07:15.530 DEBUG 3760 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet : Successfully completed request
2017-07-26 21:07:15.534 DEBUG 3760 --- [nio-8080-exec-9] o.s.web.servlet.DispatcherServlet : DispatcherServlet with name 'dispatcherServlet' processing PUT request for [/signIn]
2017-07-26 21:07:15.535 DEBUG 3760 --- [nio-8080-exec-9] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /signIn
2017-07-26 21:07:15.536 DEBUG 3760 --- [nio-8080-exec-9] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'PUT' not supported
2017-07-26 21:07:15.536 DEBUG 3760 --- [nio-8080-exec-9] .w.s.m.a.ResponseStatusExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'PUT' not supported
2017-07-26 21:07:15.536 DEBUG 3760 --- [nio-8080-exec-9] .w.s.m.s.DefaultHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'PUT' not supported
2017-07-26 21:07:15.536 WARN 3760 --- [nio-8080-exec-9] o.s.web.servlet.PageNotFound : Request method 'PUT' not supported
2017-07-26 21:07:15.536 DEBUG 3760 --- [nio-8080-exec-9] o.s.web.servlet.DispatcherServlet : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2017-07-26 21:07:15.536 DEBUG 3760 --- [nio-8080-exec-9] o.s.web.servlet.DispatcherServlet : Successfully completed request
2017-07-26 21:07:15.537 DEBUG 3760 --- [nio-8080-exec-9] o.s.web.servlet.DispatcherServlet : DispatcherServlet with name 'dispatcherServlet' processing PUT request for [/error]
2017-07-26 21:07:15.538 DEBUG 3760 --- [nio-8080-exec-9] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /error
2017-07-26 21:07:15.539 DEBUG 3760 --- [nio-8080-exec-9] s.w.s.m.m.a.RequestMappingHandlerMapping : Returning handler method [public org.springframework.web.servlet.ModelAndView com.movie.database.app.controller.error.PageNotFoundController.showPageError()]
2017-07-26 21:07:15.539 DEBUG 3760 --- [nio-8080-exec-9] o.s.web.cors.DefaultCorsProcessor : Skip CORS processing: request is from same origin
最重要的错误是
2017-07-26 21:07:15.506 DEBUG 3760 --- [nio-8080-exec-7] .w.s.m.s.DefaultHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported
2017-07-26 21:07:15.536 DEBUG 3760 --- [nio-8080-exec-9] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'PUT' not supported
2017-07-26 21:07:15.536 WARN 3760 --- [nio-8080-exec-9] o.s.web.servlet.PageNotFound : Request method 'PUT' not supported
您的错误消息告诉您问题：Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported
将contentType: 'application/json; charset=utf-8',添加到您的 ajax 调用中。还需要对整个 JSON 字符串调用JSON.stringify。查看 w3schools 页面上的 stringify 一个很好的例子，下面也复制/粘贴了。
var obj = { "name":"John", "age":30, "city":"New York"};
var myJSON = JSON.stringify(obj);