Spring Boot Validating Form Input with i18n and FreeMarker

From: Polin Wei

build.gradle

buildscript {
 ext {
  springBootVersion = '2.0.4.RELEASE'
  jjwtVersion = '0.9.0'
  findbugsVersion='3.0.1'
  bootstrapVersion = '3.3.7'
  jqueryVersion = '3.3.1'
  vueVersion ='2.5.13'
  fontawesomeVersion = '5.2.0'
  jspapiVersion = '2.3.3'
 }
 repositories {
  mavenCentral()
 }
 dependencies {
  classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
 }
}

/*
* 在這個段落中你可以聲明使用哪些外掛程式
* apply plugin: 'java' 代表這是一個Java專案，需要使用java外掛程式
* 如果想生成一個 `Intellij IDEA` 的工程，類似的如果要生成
* eclipse工程，就寫 apply plugin: 'eclipse'
* 同樣的我們要學的是Spring Boot，所以應用Spring Boot外掛程式
*/
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

// 在這個段落中你可以聲明編譯後的Jar檔資訊
bootJar {
 baseName = 'myspring'
 group = 'com.polinwei'
 version = '0.0.1-SNAPSHOT'
}

// 在這個段落中你可以聲明原始檔案和目標編譯後的Java版本相容性
sourceCompatibility = 1.8
targetCompatibility = 1.8

// 在這個段落中你可以聲明在哪裡可以找到你的項目依賴
repositories {
 mavenCentral()
 maven { url "https://repo.spring.io/snapshot" }
 maven { url "https://repo.spring.io/milestone" }
 maven { url "https://code.lds.org/nexus/content/groups/main-repo"}
 maven { url "http://maven.aliyun.com/nexus/content/repositories/central"}
}


dependencies { 
 compile("org.springframework.boot:spring-boot-starter-data-jpa")
 compile("org.springframework.boot:spring-boot-starter-thymeleaf")
 compile("org.springframework.boot:spring-boot-starter-freemarker")
 compile("org.springframework.boot:spring-boot-starter-web")
 compile("org.springframework.boot:spring-boot-starter-security")
 compile("org.springframework.security:spring-security-taglibs")
 compile("org.springframework.boot:spring-boot-devtools") // Class 程式有更改時, 自動重啟
 compile("org.hibernate.validator:hibernate-validator") //驗證
 compile("javax.servlet.jsp:javax.servlet.jsp-api:${jspapiVersion}")
 compile("org.springframework.session:spring-session-data-redis")
 compile("org.springframework.boot:spring-boot-starter-data-redis")
 runtime("mysql:mysql-connector-java")
 compileOnly("org.projectlombok:lombok")
 compile("com.maxmind.geoip2:geoip2:2.12.0")
 compile("io.jsonwebtoken:jjwt:${jjwtVersion}")
 compile("com.google.code.findbugs:findbugs:${findbugsVersion}")
 compile("org.webjars:bootstrap:${bootstrapVersion}")
 compile("org.webjars:jquery:${jqueryVersion}")
 compile("org.webjars:vue:${vueVersion}")
 compile("org.webjars:font-awesome:${fontawesomeVersion}")
 compile("org.webjars.bowergithub.lipis:flag-icon-css:3.1.0")
 compileOnly("org.springframework.boot:spring-boot-configuration-processor")
 testCompile("org.springframework.boot:spring-boot-starter-test")
 testCompile("org.springframework.security:spring-security-test")
}

model: Authority.java

/**
 * Authority generated by hbm2java
 */
@Entity
@Table(name = "authority", uniqueConstraints = @UniqueConstraint(columnNames = "name"))
public class Authority implements java.io.Serializable {

 private Long id;
 private String name;
 @Size(min=2, max=30 , message = "{Size}")
 private String description;
 private Set users = new HashSet(0);

 public Authority() {
 }

 public Authority(String name, String description) {
  this.name = name;
  this.description = description;
 }

 public Authority(String name, String description, Set users) {
  this.name = name;
  this.description = description;
  this.users = users;
 }

 @Id
 @GeneratedValue(strategy = IDENTITY)

 @Column(name = "id", unique = true, nullable = false)
 public Long getId() {
  return this.id;
 }

 public void setId(Long id) {
  this.id = id;
 }

 @Column(name = "name", unique = true, nullable = false, length = 50)
 public String getName() {
  return this.name;
 }

 public void setName(String name) {
  this.name = name;
 }

 @Column(name = "description", nullable = false, length = 100)
 public String getDescription() {
  return this.description;
 }

 public void setDescription(String description) {
  this.description = description;
 }

 @ManyToMany(fetch = FetchType.LAZY)
 @JoinTable(name = "user_authority", joinColumns = {
   @JoinColumn(name = "authority_id", nullable = false, updatable = false) }, inverseJoinColumns = {
     @JoinColumn(name = "user_id", nullable = false, updatable = false) })
 @JsonBackReference
 public Set getUsers() {
  return this.users;
 }

 public void setUsers(Set users) {
  this.users = users;
 }

}

Control: AuthorityController.java

@Controller
@RequestMapping(path = "/security")
public class AuthorityController {

 private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
 @Autowired
 private AuthorityRepository authorityRepository;
 
 public void init(Model model) {
  model.addAttribute("programName", "Authority");
 }
 
 @RequestMapping("authority")
 public String crudAuthority(Model model) {
  init(model);
  model.addAttribute("authority", new Authority());
  model.addAttribute("authorityList",authorityRepository.findAll());  
  return "/security/authority";
 }
 
 /**
  * Get Authority Role from id
  * @param model
  * @param id
  * @return
  */
 @RequestMapping(value= {"authorityEdit","authorityEdit/{id}"} , method = RequestMethod.GET)
 public String crudAuthority(Model model, @PathVariable( required = false , name="id") Long id) {
  init(model);
  if (Objects.isNull(id)) {
   model.addAttribute("authority", new Authority());
  } else {
   model.addAttribute("authority", authorityRepository.findById(id).get());
  }  
  return "/security/authority";
 }
 
 /**
  * Save Authority Role
  * @param model
  * @param authority
  * @return
  */
 @RequestMapping(value="authorityEdit" , method = RequestMethod.POST)
 public String crudAuthority(Model model, @Valid Authority authority, BindingResult bindingResult) {
  init(model);
  if (bindingResult.hasErrors()) {
   return "/security/authority";
  }
   
  authorityRepository.save(authority);
  model.addAttribute("authority", new Authority());
  return "/security/authority";
 }
 
 /**
  * Delete Authority Role
  * @param model
  * @param id
  * @return
  */
 @RequestMapping(value="authorityDelete/{id}" , method = RequestMethod.GET)
 public String authorityDelete(Model model, @PathVariable( required = true, name = "id") Long id) {
  init(model);
  authorityRepository.deleteById(id);
  model.addAttribute("authority", new Authority());
  return "/security/authority";
 }
 
}

加入了@Valid注解 是為了實現JSR-303的驗證。

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