005 使用SpringMVC开发restful API三--处理创建请求

一：主要任务

1.说明

　　@RequestBody 映射请求体到java方法的参数

　　日期类型参数的处理

　　@Valid注解

　　BindingResult验证请求参数的合法性并处理校验结果

二：@RequestBody

1.@RequestBody

　　测试类

/**
     * @throws Exception 
     * 
     */
    @Test
    public void whenCreateSuccess() throws Exception {
        String content="{"username":"tom","password":null}";
        mockMvc.perform(MockMvcRequestBuilders.post("/user")
                .contentType(MediaType.APPLICATION_JSON_UTF8)
                .content(content))
            .andExpect(MockMvcResultMatchers.status().isOk())
            .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));
    }

　　User.java

package com.cao.dto;

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;
    private String password;
    private String id;
    
    @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;
    }
    
}

　　控制类

    @JsonView(User.UserDetailView.class)
    @PostMapping
    public User create(@RequestBody User user){
        System.out.println(user.getId());
        System.out.println(user.getUsername());
        System.out.println(user.getPassword());
        
        user.setId("1");
        return user;
    }

三：日期类型的处理

1.说明

　　使用时间戳。

2.程序

　　User中添加Date类型字段

package com.cao.dto;

import java.util.Date;

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

　　测试类

    /**
     * @throws Exception 
     * 测试请求的创建
     */
    @Test
    public void whenCreateSuccess() throws Exception {
        Date date=new Date();
        System.out.println(date.getTime());
        String content="{"username":"tom","password":null,"birthday":"+date.getTime()+"}";
        String result=mockMvc.perform(MockMvcRequestBuilders.post("/user")
                .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);
    }

　　控制类

@PostMapping
    public User create(@RequestBody User user){
        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：

　　

四：@Valid

1.说明

　　只有满足校验的时候，才进行业务处理

2.校验的步骤

　　对字段进行校验要求

　　在服务上加@Valid

3.程序

　　User.java

package com.cao.dto;

import java.util.Date;

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

　　控制类

@PostMapping
    public User create(@Valid @RequestBody User user){
        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;
    }

　　测试类

/**
     * @throws Exception 
     * 测试请求的创建
     */
    @Test
    public void whenCreateSuccess() throws Exception {
        Date date=new Date();
        System.out.println(date.getTime());
        String content="{"username":"tom","password":null,"birthday":"+date.getTime()+"}";
        String result=mockMvc.perform(MockMvcRequestBuilders.post("/user")
                .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);
    }

4.效果

　　

5.BindingResult

　　在上面的程序中，校验没有通过，则请求不进入方法体，但是有时候还需要一些处理的

6.程序

　　控制类

@PostMapping
    public User create(@Valid @RequestBody User user,BindingResult errors){
        if(errors.hasErrors()) {
            errors.getAllErrors().stream().forEach(error->System.out.println(error.getDefaultMessage()));
        }
        
        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;
    }

　　控制台

　　

　　这里暂时都打印出来，个性化还需要在后面处理。