006 使用SpringMVC开发restful API四--用户信息的修复与删除，重在注解的定义

一：任务

1.任务

　　常用的验证注解

　　自定义返回消息

　　自定义校验注解

二：Hibernate Validator

1.常见的校验注解

　　

　　

2.程序

　　测试类

 /**
      * @throws Exception
      *  更新程序，主要是校验程序的验证
      *
      */
     @Test
     public void whenUpdateSuccess() throws Exception {
         //JDK1.8的特性
         Date date=new Date(LocalDateTime.now().plusYears(1).
                 atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
         System.out.println(date.getTime());
         String content="{\"id\":\"1\",\"username\":\"tom\",\"password\":null,\"birthday\":"+date.getTime()+"}";
         String result=mockMvc.perform(MockMvcRequestBuilders.put("/user/1")
                 .contentType(MediaType.APPLICATION_JSON_UTF8)
                 .content(content))
             .andExpect(MockMvcResultMatchers.status().isOk())
             .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"))
             .andReturn().getResponse().getContentAsString();
         System.out.println("result="+result);
     }

　　User.java

 package com.cao.dto;

 import java.util.Date;

 import javax.validation.constraints.Past;

 import org.hibernate.validator.constraints.NotBlank;

 import com.fasterxml.jackson.annotation.JsonView;

 public class User {
     //接口
     public interface UserSimpleView {};
     public interface UserDetailView extends UserSimpleView {};    //继承之后，可以展示父的所有

     private String username;

     @NotBlank
     private String password;
     private String id;
     private Date birthday;

     @JsonView(UserSimpleView.class)
     public String getUsername() {
         return username;
     }
     public void setUsername(String username) {
         this.username = username;
     }

     @JsonView(UserDetailView.class)
     public String getPassword() {
         return password;
     }
     public void setPassword(String password) {
         this.password = password;
     }

     @JsonView(UserSimpleView.class)
     public String getId() {
         return id;
     }
     public void setId(String id) {
         this.id = id;
     }

     @Past
     @JsonView(UserSimpleView.class)
     public Date getBirthday() {
         return birthday;
     }
     public void setBirthday(Date birthday) {
         this.birthday = birthday;
     }

 }

　　控制类

 @PutMapping("/{id:\\d+}")
     public User update(@Valid @RequestBody User user,BindingResult errors){
         if(errors.hasErrors()) {
             errors.getAllErrors().stream().forEach(error->{
                 FieldError fieldError=(FieldError)error;
                 String message=fieldError.getField()+" : "+fieldError.getDefaultMessage();
                 System.out.println(message);
             }
         );

         }

         System.out.println(user.getId());
         System.out.println(user.getUsername());
         System.out.println(user.getPassword());
         System.out.println(user.getBirthday());

         user.setId("1");
         return user;
     }    

　　效果：

　　

3.完善，自定义提示信息

　　打印的提示信息是英文的，这里提示中文的

　　在类上进行定义

 package com.cao.dto;

 import java.util.Date;

 import javax.validation.constraints.Past;

 import org.hibernate.validator.constraints.NotBlank;

 import com.fasterxml.jackson.annotation.JsonView;

 public class User {
     //接口
     public interface UserSimpleView {};
     public interface UserDetailView extends UserSimpleView {};    //继承之后，可以展示父的所有

     private String username;

     @NotBlank(message="密码不能为空")
     private String password;
     private String id;
     private Date birthday;

     @JsonView(UserSimpleView.class)
     public String getUsername() {
         return username;
     }
     public void setUsername(String username) {
         this.username = username;
     }

     @JsonView(UserDetailView.class)
     public String getPassword() {
         return password;
     }
     public void setPassword(String password) {
         this.password = password;
     }

     @JsonView(UserSimpleView.class)
     public String getId() {
         return id;
     }
     public void setId(String id) {
         this.id = id;
     }

     @Past(message="生日必须是过去的时间")
     @JsonView(UserSimpleView.class)
     public Date getBirthday() {
         return birthday;
     }
     public void setBirthday(Date birthday) {
         this.birthday = birthday;
     }

 }

　　效果

　　

三：自定义校验注解

1.新建一个Annotation

　　

2.程序

　　校验类

 package com.cao.validator;

 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;

 import javax.validation.Constraint;
 import javax.validation.Payload;

 @Target({ElementType.METHOD,ElementType.FIELD})
 @Retention(RetentionPolicy.RUNTIME)
 @Constraint(validatedBy = { MyContraintValidator.class })
 public @interface MyConstraint {
     //必写
     String message() default "{org.hibernate.validator.constraints.NotBlank.message}";
     Class<?>[] groups() default { };
     Class<? extends Payload>[] payload() default { };
     //
 }

　　校验处理类

 import javax.validation.ConstraintValidatorContext;

 import org.springframework.beans.factory.annotation.Autowired;

 import com.cao.service.HelloService;
 import com.cao.service.impl.HelloServiceImpl;

 public class MyContraintValidator implements ConstraintValidator<MyConstraint,Object> {

     //这个校验中可以注入spring容器中的任何东西
     @Autowired
     public HelloService hello;

     @Override
     public void initialize(MyConstraint constraintAnnotation) {
         System.out.println("my constraint init");
     }

     @Override
     public boolean isValid(Object value, ConstraintValidatorContext context) {
         hello.greeting("tomm");
         System.out.println(value);
         return false;
     }

 }

　　注入使用的服务

 package com.cao.service;

 public interface HelloService {
     public String greeting(String name);
 }

 package com.cao.service.impl;

 import org.springframework.stereotype.Service;

 import com.cao.service.HelloService;

 //成为Spring容器中的服务了
 @Service
 public class HelloServiceImpl implements HelloService {

     @Override
     public String greeting(String name) {
         System.out.println("greeting hello");
         return "hello "+name;
     }

 }

　　使用，放在User.java上

@MyConstraint(message="这是一个测试")
private String username;

　　测试类

     /**
      * @throws Exception
      *  更新程序，主要是校验程序的验证
      *
      */
     @Test
     public void whenUpdateSuccess() throws Exception {
         //JDK1.8的特性
         Date date=new Date(LocalDateTime.now().plusYears(1).
                 atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
         System.out.println(date.getTime());
         String content="{\"id\":\"1\",\"username\":\"Bob\",\"password\":null,\"birthday\":"+date.getTime()+"}";
         String result=mockMvc.perform(MockMvcRequestBuilders.put("/user/1")
                 .contentType(MediaType.APPLICATION_JSON_UTF8)
                 .content(content))
             .andExpect(MockMvcResultMatchers.status().isOk())
             .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"))
             .andReturn().getResponse().getContentAsString();
         System.out.println("result="+result);
     }

　　效果

　　

四：用户删除

1.程序

　　测试类

 /**
      *  删除程序，主要是校验程序的验证
      * @throws Exception
      */
     @Test
     public void whenDeleteSuccess() throws Exception {
         mockMvc.perform(MockMvcRequestBuilders.delete("/user/1")
                 .contentType(MediaType.APPLICATION_JSON_UTF8))
             .andExpect(MockMvcResultMatchers.status().isOk());
     }

　　控制类

 @DeleteMapping("/{id:\\d+}")
     public void delete(@PathVariable String id){
         System.out.println("id="+id);
     }