我有2个实体。但是我的回复类型与实体不符。
@Entity
@Table(name="customer")
public class Customer {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String firstname;
private String lastname;
private boolean available;
@OneToMany(cascade= {CascadeType.DETACH,CascadeType.MERGE,CascadeType.PERSIST,CascadeType.REFRESH})
@JoinColumn(name="customer_id")
private List<Product> products;
public Customer() {
// TODO Auto-generated constructor stub
}
public Customer(String firstname, String lastname, boolean available) {
super();
this.firstname = firstname;
this.lastname = lastname;
this.available = available;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public boolean isAvailable() {
return available;
}
public void setAvailable(boolean available) {
this.available = available;
}
public List<Product> getProducts() {
return products;
}
public void addProduct(Product product) {
if(products==null)
products=new LinkedList<Product>();
products.add(product);
}
@Override
public String toString() {
return "Customer [id=" + id + ", firstname=" + firstname + ", lastname=" + lastname
+ ", available=" + available + "]";
}
}
[GET]本地主机:8080 / myapp / customers / {id} 在这里,我想获取客户的所有数据(id,名字,姓氏,可用的产品)
{
"id" : 1,
"name" : "John",
"lastname" : "Doe",
"available" : false
"products" : {...}
}
[GET]本地主机:8080 / myapp / customers 但在这里我想带给客户一些数据(仅id,firstname,lastname)
[{
"id" : 1,
"name" : "John",
"lastname" : "Doe",
},
{
"id" : 2,
"name" : "Alex",
"lastname" : "Adams",
}]
我应该为每个响应创建新的类吗?或在控制器中编辑json数据?
答案 0 :(得分:0)
您应该隔离:
实体用于数据库操作
DTO用于与其他服务通信
因此,根据您的情况,我建议您创建DTO来处理这种情况。请注意,有许多库可以简化DTO和实体之间的转换,例如ModelMapper。
答案 1 :(得分:0)
您可以使用单个Response DTO。 示例:
此响应类型可以为import React, { Component } from "react";
import Search from "./components/Search";
import RecipesList from "./components/RecipesList";
import Recipe from "./components/Recipe";
import Constansts from "./components/constants";
import axios from "axios";
class App extends Component {
state = {
recipesList: [],
isLoading: false,
itemId: "",
recipe: "",
ingredients: ""
};
getQuery = async query => {
const { key } = Constansts;
const URL = `https://www.food2fork.com/api/search?key=${key}&q=${query}`;
if (query) {
console.log();
this.renderLoader();
try {
var res = await axios(URL);
this.setState({
recipesList: res.data.recipes,
isLoading: true
});
console.log(this.state.isLoading);
if (this.state.recipesList.length) {
this.setState({
isLoading: false
});
console.log(this.state.isLoading);
this.removeLoader();
}
} catch (error) {
console.log(error);
}
}
};
renderLoader() {
const recipesRef = this.refs.recipesRef;
const mark = `<div class="loader">
<svg viewBox="0 0 20 20">
<path d="M19.315 10h-2.372v-0.205c-0.108-4.434-3.724-7.996-8.169-7.996-4.515 0-8.174 3.672-8.174 8.201s3.659 8.199 8.174 8.199c1.898 0 3.645-0.65 5.033-1.738l-1.406-1.504c-1.016 0.748-2.27 1.193-3.627 1.193-3.386 0-6.131-2.754-6.131-6.15s2.745-6.15 6.131-6.15c3.317 0 6.018 2.643 6.125 5.945v0.205h-2.672l3.494 3.894 3.594-3.894z"></path>
</svg>
</div>`;
recipesRef.insertAdjacentHTML("afterbegin", mark);
}
removeLoader() {
const recipesRef = this.refs.recipesRef;
recipesRef.removeChild(recipesRef.childNodes[0]);
}
render() {
const { isLoading, recipesList, ingredients, recipe } = this.state;
return (
<div className="App">
<div className="wrapper">
<Search query={this.getQuery} />
<div className="recipesWrapper" ref="recipesRef">
<RecipesList isLoading={isLoading} recipesList={recipesList} />
</div>
</div>
</div>
);
}
}
export default App;
CustomerDTO
以下API的响应类型可以为[GET] localhost:8080/myapp/customers/{id}
List<CustomerDTO>