我的实体中有一个List<List<String>>字段。在某个时候，我为此添加了一个新的字符串。
我试图创建一个自定义批注，但是由于某种原因，当我尝试提交表单时，它会引发错误。
我的注释（我在此处找到并修改过的List<String>使用了注释）
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = NotEmptyFieldsValidator.class)
public @interface NotEmptyFields {
String message() default "List cannot contain empty fields";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
我的验证者：
public class NotEmptyFieldsValidator implements ConstraintValidator<NotEmptyFields, List<List<String>>> {
@Override
public void initialize(NotEmptyFields notEmptyFields) {
}
@Override
public boolean isValid(List<List<String>> lists, ConstraintValidatorContext context) {
List<String> objects = lists.stream()
.flatMap(Collection::stream)
.collect(Collectors.toList());
return objects.stream().allMatch(nef -> nef != null && !nef.trim().isEmpty());
}
}
我的控制器部分：
@RequestMapping(value = "/insert", method = { RequestMethod.POST })
public ModelAndView insert(@ModelAttribute("sprav") @Valid Spravochnik sprav, ModelMap model, BindingResult bindingResult) {
if(bindingResult.hasErrors()) {
model.addAttribute("sprav", sprav);
return new ModelAndView("insert", model);
}
if(spravochnikService.ins(sprav.getTableName(), sprav) == true) {
model.addAttribute("tableName", sprav.getTableName());
model.addAttribute("id", sprav.getId());
return new ModelAndView("redirect:/spravochnik/list/{tableName}", model);
}
else {
return new ModelAndView("error", model);
}
}
Spravochink是具有此复杂字段的结构。看起来像：
public class Spravochnik extends BaseEntity {
private String tableName;
private List<String> columnName;
@NotEmptyFields
private List<List<String>> valuesInRows;
public Spravochnik() {
}
public String getTableName() {
return tableName;
}
public void setTableName(String tableName) {
this.tableName = tableName;
}
public List<String> getColumnName() {
return columnName;
}
public void setColumnName(List<String> columnName) {
this.columnName = columnName;
}
public List<List<String>> getValuesInRows() {
return valuesInRows;
}
public void setValuesInRows(List<List<String>> valuesInRows) {
this.valuesInRows = valuesInRows;
}