spring-mvc

问题 I have the following code which represents an Ajax POST request: @RequestMapping("/participant/insertEvent") public boolean insertEvent(Principal principal, @RequestBody String json, HttpServletRequest request) throws Exception { //... //return true or false } JS: $.ajax({ type : "post", dataType : "json", url : '/app/participant/insertEvent', data : JSON.stringify({'p1': p1, 'p2' : p2}) }); The app is deployed in Production and everything has been working with many users the whole week. This

问题 I have created a simple web REST application that has to save a "change ticket" to database. But after I try to create a POST request with JSON as body I get an error: 2020-11-28 14:06:10.449 DEBUG 14864 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Completed 400 BAD_REQUEST 2020-11-28 14:06:10.453 DEBUG 14864 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : "ERROR" dispatch for POST "/error", parameters={} 2020-11-28 14:06:10.455 DEBUG 14864 --- [nio-8080-exec-2] s.w.s.m

问题 I have a person class and a personList DTO. The DTO is used to bind a list of persons object to the view. The user can edit one or more persons and click save to save the edits of all of them at once. Now I want to validate the new input. The problem is that the controller code "bindingResults.hasErrors()" is not returning the user input errors. I think it's because there's the personList DTO in the middle. Seems it is checking just errors in the personList class, but not in the person class

问题 I have a person class and a personList DTO. The DTO is used to bind a list of persons object to the view. The user can edit one or more persons and click save to save the edits of all of them at once. Now I want to validate the new input. The problem is that the controller code "bindingResults.hasErrors()" is not returning the user input errors. I think it's because there's the personList DTO in the middle. Seems it is checking just errors in the personList class, but not in the person class

问题 I have a person class and a personList DTO. The DTO is used to bind a list of persons object to the view. The user can edit one or more persons and click save to save the edits of all of them at once. Now I want to validate the new input. The problem is that the controller code "bindingResults.hasErrors()" is not returning the user input errors. I think it's because there's the personList DTO in the middle. Seems it is checking just errors in the personList class, but not in the person class

问题 I have a person class and a personList DTO. The DTO is used to bind a list of persons object to the view. The user can edit one or more persons and click save to save the edits of all of them at once. Now I want to validate the new input. The problem is that the controller code "bindingResults.hasErrors()" is not returning the user input errors. I think it's because there's the personList DTO in the middle. Seems it is checking just errors in the personList class, but not in the person class

问题 I have a REST endpoint that has to be accessed to retrieve a resource (image, document, ...). @RequestMapping(value = "/attachement", method = RequestMethod.GET) @ResponseBody public Object getTrademarkAttachement(HttpServletResponse response, HttpServletRequest request) { //TODO : Retrieve bytes from microservice url //TODO : Send bytes to frontend page } For retrieving this document, I want to do it via streaming . I don't want to store in memory the info . I want to , as I get the info,

问题 I have a REST endpoint that has to be accessed to retrieve a resource (image, document, ...). @RequestMapping(value = "/attachement", method = RequestMethod.GET) @ResponseBody public Object getTrademarkAttachement(HttpServletResponse response, HttpServletRequest request) { //TODO : Retrieve bytes from microservice url //TODO : Send bytes to frontend page } For retrieving this document, I want to do it via streaming . I don't want to store in memory the info . I want to , as I get the info,

问题 I'm following this tutorial which uses Spring MVC, Spring Boot and Thymeleaf as the view. I'm getting a Template Parsing Error when I use a checkbox input on the HTML form, and strangely, when I remove the checkbox input, everything works well. Here is the HTML - <!DOCTYPE html> <html lang="en" xmlns:th="https://www.thymeleaf.org/"> <head> <meta charset="UTF-8"> <title>Home Page</title> <style> h1,h2 { color: rebeccapurple; } </style> </head> <body> <h1>This is home page</h1> <h2>Enter data

问题 I'm following this tutorial which uses Spring MVC, Spring Boot and Thymeleaf as the view. I'm getting a Template Parsing Error when I use a checkbox input on the HTML form, and strangely, when I remove the checkbox input, everything works well. Here is the HTML - <!DOCTYPE html> <html lang="en" xmlns:th="https://www.thymeleaf.org/"> <head> <meta charset="UTF-8"> <title>Home Page</title> <style> h1,h2 { color: rebeccapurple; } </style> </head> <body> <h1>This is home page</h1> <h2>Enter data