資訊專欄INFORMATION COLUMN
這篇文篇主要簡述如何在springboot中驗證表單信息。在springmvc工程中，需要檢查表單信息，表單信息驗證主要通過注解的形式。
構(gòu)建工程創(chuàng)建一個springboot工程，由于用到了 web 、thymeleaf、validator、el，引入相應(yīng)的起步依賴和依賴，代碼清單如下：
創(chuàng)建一個PresonForm的Object類org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-starter-thymeleaf org.hibernate hibernate-validator org.apache.tomcat.embed tomcat-embed-el
package com.forezp.entity;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
/**
* Created by fangzhipeng on 2017/4/19.
*/
public class PersonForm {
@NotNull
@Size(min=2, max=30)
private String name;
@NotNull
@Min(18)
private Integer age;
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String toString() {
return "Person(Name: " + this.name + ", Age: " + this.age + ")";
}
}
這個實體類，在2個屬性:name,age.它們各自有驗證的注解：
@Size(min=2, max=30) name的長度為2-30個字符 @NotNull 不為空 @Min(18)age不能小于18創(chuàng)建 web Controller
@Controller
public class WebController extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/results").setViewName("results");
}
@GetMapping("/")
public String showForm(PersonForm personForm) {
return "form";
}
@PostMapping("/")
public String checkPersonInfo(@Valid PersonForm personForm, BindingResult bindingResult) {
if (bindingResult.hasErrors()) {
return "form";
}
return "redirect:/results";
}
}
創(chuàng)建form表單
src/main/resources/templates/form.html:
注冊成功的頁面
src/main/resources/templates/results.html:
html>
Congratulations! You are old enough to sign up for this site.