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79 lines
2.3 KiB
Markdown
79 lines
2.3 KiB
Markdown
---
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title: Class converted with multiple class
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order: 4
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category:
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- Guide
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description: MapStructPlus 一个类与多个类之间转换 multiple class convert
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---
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MapStructPlus supports conversion of a single class to multiple target types as well as a single class to a single target type.
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## Configure multiplee class conversions
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When you want to configure a class to convert to multiple classes, you can do so through `@AutoMappers`, which supports configure multiple `@AutoMapper`
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eg：
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```java
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@Data
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@AutoMappers({
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@AutoMapper(target = UserDto.class),
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@AutoMapper(target = UserVO.class)
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})
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public class User {
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// fields
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}
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```
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## Configures the rules for the specified class transformation
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When configuring multiple class conversions, the same property has different conversion rules for different classes.
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To solve this problem, you can first specify multiple transformation rules using `@AutoMappings` and,
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when using the `@AutoMapping` annotation, configure the `targetClass` attribute to specify the application target transformation class for the current rule.
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If `targetClass` is not specified when the `@AutoMapping` annotation is configured, the current rule applies to all class conversions.
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:::info
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`targetClass` also supports the configuration parent class, which applies to this rule when the target class is a subclass of the configured `targetClass`.
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> This feature is supported from 1.3.6
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:::
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eg：
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```java
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@Data
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@AutoMappers({
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@AutoMapper(target = UserDto.class),
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@AutoMapper(target = UserVO.class)
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})
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public class User {
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private String username;
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private int age;
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private boolean young;
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@AutoMapping(targetClass = UserDto.class, target = "educations", expression = "java(java.lang.String.join(\",\", source.getEducationList()))")
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private List<String> educationList;
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@AutoMappings({
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@AutoMapping(targetClass = UserDto.class, dateFormat = "yyyy-MM-dd HH:mm:ss"),
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@AutoMapping(targetClass = UserVO.class, ignore = true)
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})
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private Date birthday;
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@AutoMapping(targetClass = UserDto.class, numberFormat = "$0.00")
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private double assets;
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@AutoMapping(numberFormat = "$0.00")
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private double money;
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@AutoMappings({
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@AutoMapping(targetClass = UserVO.class, target = "voField")
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})
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private String voField;
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}
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``` |