Dozer的使用: 整合Spring

青旅半醒 2021-09-17 14:32 367阅读 0赞

[https://blog.csdn.net/github\_36581033/article/details/79187116][https_blog.csdn.net_github_36581033_article_details_79187116]

Dozer与Spring的使用  
Dozer是对象转换工具。比如说，当你在Controller层有一个对象ClassA，但是你要传一个ClassAVO对象给Service层，这时可以使用Dozer将对象ClassA转换成所需要的VO类。当然你也可以在其它层做这样的操作，下面使用一个例子展现Dozer到底是如何工作的：  
1  
1.使用Maven管理依赖包   
pom.xml文件如下

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.symbio</groupId>
     <artifactId>dozer</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <properties>
         <spring.version>5.0.3.RELEASE</spring.version>
     </properties>
     <dependencies>
         <dependency>
             <groupId>net.sf.dozer</groupId>
             <artifactId>dozer</artifactId>
             <version>5.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-beans</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-web</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-jdbc</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-aspects</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context-support</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
             <version>${spring.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
 </project>

2.新建四个类ClassA、ClassB、SubClassA、SubClassB

import java.util.Date;
 import java.util.List;
 
 public class ClassA {
     private Integer id;
     private String name;
     private Date date;
     private List<SubClassA> subA;
     一律省略getter and setter...
 }
 import java.util.Date;
 import java.util.List;
 
 public class ClassB {
     private Integer id;
     private String username;
     private Date birth;
     private List<SubClassB> subB;
     ...
 }
 public class SubClassA {
     private String color;
     private Integer price;
     ...
 }
 public class SubClassB {
     private String myColor;
     private String price;
     ...
 }

3.使用xml方式映射，在src/main/resource下新建dozer-mapping.xml文件

<?xml version="1.0" encoding="UTF-8"?>
 <mappings xmlns="http://dozer.sourceforge.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://dozer.sourceforge.net
           http://dozer.sourceforge.net/schema/beanmapping.xsd">
 
     <mapping date-format="yyyy-MM-dd">
         <class-a>com.symbio.dozertest.ClassA</class-a>
         <class-b>com.symbio.dozertest.ClassB</class-b>
         <field>
             <a>name</a>
             username
         </field>
         <field>
             <a>date</a>
             birth
         </field>
         <field>
             <a>subA</a>
             subB
             
             <a-hint>com.symbio.dozertest.SubClassA</a-hint>
             <b-hint>com.symbio.dozertest.SubClassB</b-hint>
 
         </field>
     </mapping>
     <mapping>
         <class-a>com.symbio.dozertest.SubClassA</class-a>
         <class-b>com.symbio.dozertest.SubClassB</class-b>
         <field>
             <a>color</a>
             myColor
         </field>
         
         
     </mapping>
 </mappings>

4.Spring和Dozer整合，在这里新建spring-dozer.xml文件，当然其它名字也可以de

<?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"
        default-autowire="byName" default-lazy-init="false">
 
   <bean id="mapper" class="org.dozer.spring.DozerBeanMapperFactoryBean">
     <property name="mappingFiles">
       <list>
         
         <value>classpath*:dozer-mapping.xml</value>
       </list>
     </property>
   </bean>
 </beans>

5.测试类DozerTest.java

import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
 import org.dozer.Mapper;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 
 @ContextConfiguration(locations = {"classpath:spring-dozer.xml"})
 public class DozerTest {
 
     @Autowired
     Mapper mapper;
 
     @Test
     public void dozerMap() {
         System.out.println("mapper:"+mapper);
         ClassA a = new ClassA();
         a.setId(123);
         a.setName("Curry");
         a.setDate(new Date());
         List<SubClassA> subAList = new ArrayList<SubClassA>();
         SubClassA subA = new SubClassA();
         subA.setColor("red");
         subA.setPrice(120);
         subAList.add(subA);
         a.setSubA(subAList);
         ClassB b = mapper.map(a, ClassB.class);
         System.out.println("ClassB:"+b);
     }
 }

测试结果

[https_blog.csdn.net_github_36581033_article_details_79187116]: https://blog.csdn.net/github_36581033/article/details/79187116