使用ForMember指定字段映射数据来源 - AutoMapper指南

使用"ForMember"可以指定字段的映射数据来源。你可以使用"mapFrom"方法来指定字段的映射数据来源。\n\n例子：\n\njava\npublic class Source {\n private String sourceField;\n\n // getter and setter\n}\n\npublic class Destination {\n private String destinationField;\n\n // getter and setter\n}\n\npublic class Mapper {\n public static void main(String[] args) {\n MapperFactory mapperFactory = new DefaultMapperFactory.Builder().build();\n \n mapperFactory.classMap(Source.class, Destination.class)\n .field("sourceField", "destinationField", \n (source, destinationField, context) -> source.getSourceField() + "_mapped")\n .register();\n \n MapperFacade mapperFacade = mapperFactory.getMapperFacade();\n\n Source source = new Source();\n source.setSourceField("value");\n\n Destination destination = mapperFacade.map(source, Destination.class);\n\n System.out.println(destination.getDestinationField()); // Output: "value_mapped"\n }\n}\n\n\n在上面的例子中，我们使用"ForMember"指定了"sourceField"字段的映射数据来源为"source.getSourceField() + "_mapped""，即在映射过程中，会将"sourceField"字段的值加上"_mapped"后赋值给"destinationField"字段。