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

 1 /**
 2      * @throws Exception
 3      *  更新程序，主要是校验程序的验证
 4      *
 5      */
 6     @Test
 7     public void whenUpdateSuccess() throws Exception {
 8         //JDK1.8的特性
 9         Date date=new Date(LocalDateTime.now().plusYears(1).
10                 atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
11         System.out.println(date.getTime());
12         String content="{\"id\":\"1\",\"username\":\"tom\",\"password\":null,\"birthday\":"+date.getTime()+"}";
13         String result=mockMvc.perform(MockMvcRequestBuilders.put("/user/1")
14                 .contentType(MediaType.APPLICATION_JSON_UTF8)
15                 .content(content))
16             .andExpect(MockMvcResultMatchers.status().isOk())
17             .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"))
18             .andReturn().getResponse().getContentAsString();
19         System.out.println("result="+result);
20     }

　　User.java

 1 package com.cao.dto;
 2
 3 import java.util.Date;
 4
 5 import javax.validation.constraints.Past;
 6
 7 import org.hibernate.validator.constraints.NotBlank;
 8
 9 import com.fasterxml.jackson.annotation.JsonView;
10
11 public class User {
12     //接口
13     public interface UserSimpleView {};
14     public interface UserDetailView extends UserSimpleView {};    //继承之后，可以展示父的所有
15
16     private String username;
17
18     @NotBlank
19     private String password;
20     private String id;
21     private Date birthday;
22
23     @JsonView(UserSimpleView.class)
24     public String getUsername() {
25         return username;
26     }
27     public void setUsername(String username) {
28         this.username = username;
29     }
30
31     @JsonView(UserDetailView.class)
32     public String getPassword() {
33         return password;
34     }
35     public void setPassword(String password) {
36         this.password = password;
37     }
38
39     @JsonView(UserSimpleView.class)
40     public String getId() {
41         return id;
42     }
43     public void setId(String id) {
44         this.id = id;
45     }
46
47     @Past
48     @JsonView(UserSimpleView.class)
49     public Date getBirthday() {
50         return birthday;
51     }
52     public void setBirthday(Date birthday) {
53         this.birthday = birthday;
54     }
55
56 }

　　控制类

 1 @PutMapping("/{id:\\d+}")
 2     public User update(@Valid @RequestBody User user,BindingResult errors){
 3         if(errors.hasErrors()) {
 4             errors.getAllErrors().stream().forEach(error->{
 5                 FieldError fieldError=(FieldError)error;
 6                 String message=fieldError.getField()+" : "+fieldError.getDefaultMessage();
 7                 System.out.println(message);
 8             }
 9         );
10
11         }
12
13         System.out.println(user.getId());
14         System.out.println(user.getUsername());
15         System.out.println(user.getPassword());
16         System.out.println(user.getBirthday());
17
18         user.setId("1");
19         return user;
20     }    

　　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

 1 package com.cao.dto;
 2
 3 import java.util.Date;
 4
 5 import javax.validation.constraints.Past;
 6
 7 import org.hibernate.validator.constraints.NotBlank;
 8
 9 import com.fasterxml.jackson.annotation.JsonView;
10
11 public class User {
12     //接口
13     public interface UserSimpleView {};
14     public interface UserDetailView extends UserSimpleView {};    //继承之后，可以展示父的所有
15
16     private String username;
17
18     @NotBlank(message="密码不能为空")
19     private String password;
20     private String id;
21     private Date birthday;
22
23     @JsonView(UserSimpleView.class)
24     public String getUsername() {
25         return username;
26     }
27     public void setUsername(String username) {
28         this.username = username;
29     }
30
31     @JsonView(UserDetailView.class)
32     public String getPassword() {
33         return password;
34     }
35     public void setPassword(String password) {
36         this.password = password;
37     }
38
39     @JsonView(UserSimpleView.class)
40     public String getId() {
41         return id;
42     }
43     public void setId(String id) {
44         this.id = id;
45     }
46
47     @Past(message="生日必须是过去的时间")
48     @JsonView(UserSimpleView.class)
49     public Date getBirthday() {
50         return birthday;
51     }
52     public void setBirthday(Date birthday) {
53         this.birthday = birthday;
54     }
55
56 }

　　效果

三：自定义校验注解

1.新建一个Annotation

2.程序

　　校验类

 1 package com.cao.validator;
 2
 3 import java.lang.annotation.ElementType;
 4 import java.lang.annotation.Retention;
 5 import java.lang.annotation.RetentionPolicy;
 6 import java.lang.annotation.Target;
 7
 8 import javax.validation.Constraint;
 9 import javax.validation.Payload;
10
11 @Target({ElementType.METHOD,ElementType.FIELD})
12 @Retention(RetentionPolicy.RUNTIME)
13 @Constraint(validatedBy = { MyContraintValidator.class })
14 public @interface MyConstraint {
15     //必写
16     String message() default "{org.hibernate.validator.constraints.NotBlank.message}";
17     Class<?>[] groups() default { };
18     Class<? extends Payload>[] payload() default { };
19     //
20 }

　　校验处理类

 1 import javax.validation.ConstraintValidatorContext;
 2
 3 import org.springframework.beans.factory.annotation.Autowired;
 4
 5 import com.cao.service.HelloService;
 6 import com.cao.service.impl.HelloServiceImpl;
 7
 8 public class MyContraintValidator implements ConstraintValidator<MyConstraint,Object> {
 9
10     //这个校验中可以注入spring容器中的任何东西
11     @Autowired
12     public HelloService hello;
13
14     @Override
15     public void initialize(MyConstraint constraintAnnotation) {
16         System.out.println("my constraint init");
17     }
18
19     @Override
20     public boolean isValid(Object value, ConstraintValidatorContext context) {
21         hello.greeting("tomm");
22         System.out.println(value);
23         return false;
24     }
25
26 }

　　注入使用的服务

1 package com.cao.service;
2
3 public interface HelloService {
4     public String greeting(String name);
5 }

 1 package com.cao.service.impl;
 2
 3 import org.springframework.stereotype.Service;
 4
 5 import com.cao.service.HelloService;
 6
 7 //成为Spring容器中的服务了
 8 @Service
 9 public class HelloServiceImpl implements HelloService {
10
11     @Override
12     public String greeting(String name) {
13         System.out.println("greeting hello");
14         return "hello "+name;
15     }
16
17 }

　　使用，放在User.java上

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

　　测试类

 1     /**
 2      * @throws Exception
 3      *  更新程序，主要是校验程序的验证
 4      *
 5      */
 6     @Test
 7     public void whenUpdateSuccess() throws Exception {
 8         //JDK1.8的特性
 9         Date date=new Date(LocalDateTime.now().plusYears(1).
10                 atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
11         System.out.println(date.getTime());
12         String content="{\"id\":\"1\",\"username\":\"Bob\",\"password\":null,\"birthday\":"+date.getTime()+"}";
13         String result=mockMvc.perform(MockMvcRequestBuilders.put("/user/1")
14                 .contentType(MediaType.APPLICATION_JSON_UTF8)
15                 .content(content))
16             .andExpect(MockMvcResultMatchers.status().isOk())
17             .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"))
18             .andReturn().getResponse().getContentAsString();
19         System.out.println("result="+result);
20     }

　　效果

四：用户删除

1.程序

　　测试类

 1 /**
 2      *  删除程序，主要是校验程序的验证
 3      * @throws Exception
 4      */
 5     @Test
 6     public void whenDeleteSuccess() throws Exception {
 7         mockMvc.perform(MockMvcRequestBuilders.delete("/user/1")
 8                 .contentType(MediaType.APPLICATION_JSON_UTF8))
 9             .andExpect(MockMvcResultMatchers.status().isOk());
10     }

　　控制类

1 @DeleteMapping("/{id:\\d+}")
2     public void delete(@PathVariable String id){
3         System.out.println("id="+id);
4     }    

原文地址：https://www.cnblogs.com/juncaoit/p/9710464.html