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);
    }