Question

我正在尝试验证一些信息，所以我添加了一个验证器并在post方法的参数中使用了@Valid：

@Controller
@RequestMapping("/user.htm")
public class UserController {

    @Autowired
    private IUserService userService;

    @RequestMapping(method = RequestMethod.GET)
    public String userInfo(Model model) {
       ....
        return "user";
    }

    @RequestMapping(method = RequestMethod.POST)
    public String userInfoResult(@Valid @ModelAttribute UserForm userForm, BindingResult result, Model model ) {

        UserInfo stat = userService.getStatitisque(userForm.getSearchCritera());
        userForm.setListeExpediteur(listeExpediteur);

        userForm.setUserInfo(stat);
        model.addAttribute("userForm", userForm);
    }    
}

public class UserFormValidator implements Validator {

    @Override
    public boolean supports(Class<?> type) {
        return UserForm.class.equals(type);
    }

    @Override
    public void validate(Object o, Errors errors) {
        UserForm userForm = (User) o;
        ...
    }
}

当我调试时，我从未进入UserFormValidator类。

我是否需要在这些文件中添加内容？

web.xml
applicationContext.xml
dispatcher-servlet.xml

Answer 1

您需要使用@InitBinder方法添加验证程序：

@InitBinder(value="YourFormObjectName")
protected void initBinder(WebDataBinder binder) {
    binder.setValidator(new FooValidator());
}

或通过XML全局：

<mvc:annotation-driven validator="globalValidator"/>

<强>参考：

5.7.4.2 Configuring a Validator for use by Spring MVC

Answer 2

5.7.4.3配置一个JSR-303验证器供Spring MVC使用

使用JSR-303，单个javax.validation.Validator实例通常验证声明验证约束的所有模型对象。要使用Spring MVC配置支持JSR-303的Validator，只需将一个JSR-303提供程序（如Hibernate Validator）添加到类路径。 Spring MVC将检测它并自动为所有控制器启用JSR-303支持。

<mvc:annotation-driven/>

使用此最小配置，无论何时遇到@Valid @Controller输入，它都将由JSR-303提供程序验证。反过来，JSR-303将强制执行针对输入声明的任何约束。任何ConstraintViolations都将自动暴露为标准Spring MVC表单标签可渲染的BindingResult中的错误。

Answer 3

@Controller
@RequestMapping("/user.htm")
public class UserController {
@Autowired
private IUserService userService;

@RequestMapping(method = RequestMethod.GET)
public String userInfo(Model model) {
   ....
    return "user";
}

@RequestMapping(method = RequestMethod.POST)
public String userInfoResult(Model model,
                             @Valid @ModelAttribute UserForm userForm,
                             BindingResult result) {
    /*
       add custom validation check to standard validation error
       (if not registry UserFormValidator in @InitBinder block)
    */
    new UserFormValidator().validate(userForm, error); 

    // check all validation errors   
    if (errors.hasErrors()) {
        // go back
        return userInfo(model);
    }

    ...
  } 
}

Answer 4

您需要在@InitBinder方法中添加验证器

library(shiny)
library(shinydashboardPlus)
library(shinyWidgets)

css <- "
.inlinecheckbox .shiny-input-container {
  display: inline-block;
  width: auto;
}
"

ui <- fluidPage(
  tags$style(css),
  titlePanel("Dynamic to do list"),
  useShinydashboardPlus(),
  sidebarLayout(
    sidebarPanel(),
    mainPanel(
      box(
        "Sortable todo list demo",
        status = "warning",
        uiOutput("myToDoList")     
      )
    )
  )
)

checkboxIDs <- paste0("checkbox", seq_len(nrow(mtcars)))
mtcars$checked <- FALSE

# Define server logic required to draw a histogram
server <- function(input, output) {
  
  reactiveMtcars <- reactiveVal(mtcars)
  
  observe({
    for (i in seq_along(checkboxIDs)) {
      if(!is.null(input[[checkboxIDs[1]]])){
        mtcars$checked[i] <- input[[checkboxIDs[i]]]  
      }
    }
    
    reactiveMtcars(mtcars)
  })
  
  output$myToDoList <- renderUI({
    req(reactiveMtcars())
    todoListItems <- list() 
    for(i in seq_len(nrow(reactiveMtcars()))){
      todoListItems[[i]] <- todoListItem(
        label = div(rownames(reactiveMtcars())[i], style = ""), 
        span(class = "inlinecheckbox", checkboxInput(inputId = paste0("checkbox", i), label = NULL, value = reactiveMtcars()$checked[i])),
        checked = reactiveMtcars()$checked[i],
      )
    }
    
    todoList(todoListItems)
  })
  
}

shinyApp(ui = ui, server = server)

Spring验证器从未调用过

4 个答案: