Spring Boot DTO 到实体映射

在春季启动中，有很多不同的方法可以将DTO映射到实体，反之亦然，我们可以使用Modelmapper，Mapstruct，Dozermapper。

完整示例

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按照完整的文章了解如何使用模型映射器将 DTO 映射到实体对象。

创建 Spring 引导项目

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有许多不同的方法可以创建一个 Spring 启动应用程序，您可以按照以下文章创建一个 –

>> 使用 Spring 初始值设定项
创建 Spring 启动应用程序>>在 Spring 工具套件中创建 Spring 启动应用程序 [STS]
>>在 IntelliJ IDEA 中创建 Spring 启动应用程序

添加 maven 依赖项

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打开pom.xml并添加以下依赖项 –

"1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0modelVersion>
	<parent>
		<groupId>org.springframework.bootgroupId>
		<artifactId>spring-boot-starter-parentartifactId>
		<version>2.5.5version>
		<relativePath /> 
	parent>
	<groupId>in.bushansirgurgroupId>
	<artifactId>springbootappartifactId>
	<version>1.0.0version>
	<name>springbootappname>
	<description>Spring boot appdescription>
	<properties>
		<java.version>1.8java.version>
	properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.bootgroupId>
			<artifactId>spring-boot-starter-webartifactId>
		dependency>
		
		<dependency>
			<groupId>org.modelmappergroupId>
			<artifactId>modelmapperartifactId>
			<version>0.7.4version>
		dependency>
		
		<dependency>
			<groupId>org.springframework.bootgroupId>
			<artifactId>spring-boot-starter-testartifactId>
			<scope>testscope>
		dependency>
	dependencies>
 
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.bootgroupId>
				<artifactId>spring-boot-maven-pluginartifactId>
			plugin>
		plugins>
	build>
 
project>

spring-boot-starter-web依赖项，用于使用 Spring MVC 构建 Web 应用程序。它使用 tomcat 作为默认的嵌入式容器。org.modelmapper依赖项用于使用模型映射器将 DTO 映射到实体以及将实体映射到 DTO。

 

创建 DTO 类

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在in.bushansirgur.dto包中创建EmployeeDTO.java并添加以下内容

package in.bushansirgur.springbootapp.entity;
 
public class EmployeeDTO {
	
private String name;
	
	private int age;
	
	private String location;
 
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
 
	public int getAge() {
		return age;
	}
 
	public void setAge(int age) {
		this.age = age;
	}
 
	public String getLocation() {
		return location;
	}
 
	public void setLocation(String location) {
		this.location = location;
	}
	
}

创建实体类

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在in.bushansirgur.entity包中创建员工.java并添加以下内容

package in.bushansirgur.springbootapp.entity;
 
public class Employee {
	
private String name;
	
	private int age;
	
	private String location;
 
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
 
	public int getAge() {
		return age;
	}
 
	public void setAge(int age) {
		this.age = age;
	}
 
	public String getLocation() {
		return location;
	}
 
	public void setLocation(String location) {
		this.location = location;
	}
 
	@Override
	public String toString() {
		return "Employee [name=" + name + ", age=" + age + ", location=" + location + "]";
	}
	
}

创建控制器

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创建HomeController.java在in.bushansirgur.Controller包中添加以下内容

package in.bushansirgur.springbootapp.controller;
 
import org.modelmapper.ModelMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
 
import in.bushansirgur.springbootapp.entity.Employee;
import in.bushansirgur.springbootapp.model.EmployeeDTO;
 
@RestController
public class HomeController {
	
	@Autowired
	private ModelMapper mapper;
	
	@PostMapping("/save")
	public Employee save(@RequestBody EmployeeDTO employeeDto) {
		Employee employee = mapper.map(employeeDto, Employee.class);
		System.out.println("Printing employee after mapping:"+employee);
		return employee;
	}
}

运行应用

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使用以下 maven 命令运行应用程序 –

mvn spring-boot:run

打开浏览器并输入以下网址 –

http://localhost:8080/save 这篇文章就是这样