将复杂实体转换为DTO，使用ModelMapper。

huangapple
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英文:

Convert Complex Entity to DTO With ModelMapper

问题

我正在使用Spring Boot开发一个REST API。当我想要从一个端点返回我的实体时，我意识到属性与我在响应中所需的不同，所以我尝试使用Model Mapper来返回一个DTO。

我的实体是这样的：

  1. public class RuleEntity {
  2.     private String ruleId;
  3.     private String bankDecision;
  4.     private String aggregatorFunctionType;
  5.     private String limitOperatorType;
  6.     private double limitRule;
  7.     private Integer windowMinutes;
  8.     private Integer layer;
  9.     private String expressionRule;
  10.     private String status;
  11.     private List<GroupingKeyName> groupingKeyNames;
  12.     private List<RuleFilter> ruleFilters;
  13. }

而我需要的DTO如下：

  1. public class RuleDTO {
  2.     private String ruleId;
  3.     private String bankDecision;
  4.     private String aggregatorFunctionType;
  5.     private String limitOperatorType;
  6.     private double limitRule;
  7.     private Integer windowMinutes;
  8.     private Integer layer;
  9.     private String expressionRule;
  10.     private String status;
  11.     private List<String> groupingKeyNames;
  12.     private List<String> ruleFilters;
  13. }

唯一的变化是最后两个列表中的对象是字符串，而不是对象。

groupingKeyNames和ruleFilters对象具有名称和ID，我只需要在DTO的列表中使用名称，因此它是一个字符串列表。

我尝试使用以下方式使用Model Mapper：

  1. ModelMapper modelMapper = new ModelMapper();
  2. RuleDTO ruleDTO = modelMapper.map(ruleEntity, RuleDTO.class);

这可以工作，可以处理所有的属性，但在列表中，它返回类似于以下的内容：

  1. groupingKeyNames=[GroupingKeyName(groupingKeyId=1, name=cardHash)], ruleFilters=[RuleFilter(ruleFilterId=1, name=status)]

我应该怎么做才能获得以下结果：

  1. groupingKeyNames=[cardHash]，ruleFilters=[status]

提前感谢您的帮助！

英文:

i'm working in a rest API using Spring boot.
when i wanted to return my entity from an End Point i realized that the Properties are different from what i need on my response so i tried to use Model Mapper to return a DTO.

My entity is like this:

  1. public class RuleEntity {
  3. private String ruleId;
  4. private String bankDecision;
  5. private String aggregatorFunctionType;
  6. private String limitOperatorType;
  7. private double limitRule;
  8. private Integer windowMinutes;
  9. private Integer layer;
  10. private String expressionRule;
  11. private String status;
  12. private List&lt;GroupingKeyName&gt; groupingKeyNames;
  13. private List&lt;RuleFilter&gt; ruleFilters;

}

And the DTO that i need Must Be Like this:

  1. public class RuleDTO {
  3. private String ruleId;
  4. private String bankDecision;
  5. private String aggregatorFunctionType;
  6. private String limitOperatorType;
  7. private double limitRule;
  8. private Integer windowMinutes;
  9. private Integer layer;
  10. private String expressionRule;
  11. private String status;
  12. private List&lt;String&gt; groupingKeyNames;
  13. private List&lt;String&gt; ruleFilters;

}

The only change is that the last two lists are of String instead of The Object

The Objects groupingKeyNames and ruleFilters have a Name and an ID, and i only need the name on the list of DTO so it is a List of Strings

I tried using Model Mapper like this:

  1. ModelMapper modelMapper = new ModelMapper();
  2.     RuleSetModel ruleSetModel =  modelMapper.map(ruleSetEntity, RuleSetModel.class);

it works, with all the properties but in the Lists it is returning something like:

  1. groupingKeyNames=[GroupingKeyName(groupingKeyId=1, name=cardHash)], ruleFilters=[RuleFilter(ruleFilterId=1, name=status)]

What could i do so i get a result like this:

  1. groupingKeyNames=[cardHash], ruleFilters=[status]

Thanks in advance!

答案1

得分: 1

  1. // 在你的 RuleEntity 中创建一个方法来完成这个操作
  2. public RuleDTO dto() {
  3.     // 配置以跳过某些属性
  4.     PropertyMap<RuleEntity, RuleDTO> propertyMap = new PropertyMap<RuleEntity, RuleDTO>() {
  5.         @Override
  6.         protected void configure() {
  7.             skip(destination.getGroupingKeyNames());
  8.             skip(destination.getRuleFilters());
  9.         }
  10.     };
  12.     RuleDTO ruleDTO = new RuleDTO();
  13.     ModelMapper modelMapper = new ModelMapper();
  14.     modelMapper.getConfiguration().setPropertyCondition(Conditions.isNotNull());
  15.     modelMapper.addMappings(propertyMap);
  16.     modelMapper.map(this, ruleDTO);
  18.     if (!this.groupingKeyNames.isEmpty()) {
  19.         ruleDTO.getGroupingKeyNames().clear();
  20.         List<String> tmpGroupingKeyNames = new ArrayList<>();
  21.         this.getGroupingKeyNames().forEach(itemDTO -> {
  22.             tmpGroupingKeyNames.add(itemDTO.name);
  23.         });
  24.         ruleDTO.getGroupingKeyNames().addAll(tmpGroupingKeyNames);
  25.     }
  27.     if (!this.ruleFilters.isEmpty()) {
  28.         ruleDTO.getRuleFilters().clear();
  29.         List<String> tmpRuleFilters = new ArrayList<>();
  30.         this.getRuleFilters().forEach(itemDTO -> {
  31.             tmpRuleFilters.add(itemDTO.name);
  32.         });
  33.         ruleDTO.getRuleFilters().addAll(tmpRuleFilters);
  34.     }
  35.     return ruleDTO;
  36. }
英文:

Create a method into your RuleEntity to do it

  1. 	public RuleDTO dto() {
  2. 	// config to skip 
  3. 	PropertyMap&lt;RuleEntity, RuleDTO&gt; propertyMap = new PropertyMap&lt;RuleEntity, RuleDTO&gt;() {
  4. 		@Override
  5. 		protected void configure() {
  6. 			skip(destination.getGroupingKeyNames());
  7. 			skip(destination.getRuleFilters());
  8. 		}
  9. 	};
  11. 	RuleDTO ruleDTO = new RuleDTO();
  12. 	ModelMapper modelMapper = new ModelMapper();
  13. 	modelMapper.getConfiguration().setPropertyCondition(Conditions.isNotNull());
  14. 	modelMapper.addMappings(propertyMap);
  15. 	modelMapper.map(this,ruleDTO);
  17. 	if (!this.groupingKeyNames.isEmpty()) {
  18. 		ruleDTO.getGroupingKeyNames().clear();
  19. 		List&lt;String&gt; tmpGroupingKeyNames = new ArrayList&lt;&gt;();
  20. 		this.getGroupingKeyNames().forEach(itemDTO -&gt; {
  21. 			tmpGroupingKeyNames.add(itemDTO.name);
  22. 		});
  23. 		ruleDTO.getGroupingKeyNames().addAll(tmpGroupingKeyNames);
  24. 	}
  26. 	if (!this.ruleFilters.isEmpty()) {
  27. 		ruleDTO.getRuleFilters().clear();
  28. 		List&lt;String&gt; tmpRuleFilters = new ArrayList&lt;&gt;();
  29. 		this.getRuleFilters().forEach(itemDTO -&gt; {
  30. 			tmpRuleFilters.add(itemDTO.name);
  31. 		});
  32. 		ruleDTO.getRuleFilters().addAll(tmpRuleFilters);
  33. 	}
  34. 	return ruleDTO;
  35. }

huangapple
  • 本文由 发表于 2020年5月29日 04:42:41
  • 转载请务必保留本文链接：https://go.coder-hub.com/62074173.html
  • dto
  • java
  • modelmapper
  • spring-boot
  • spring-mvc
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