假设我们有以下类：
public abstract class Investment {
private String investmentType;
// getters & setters
}
public class Equity extends Investment {
}
public class Bond extends Investment {
}
public class InvestmentFactory {
public static Investment getTypeFromString(String investmentType) {
Investment investment = null;
if ("Bond".equals(investmentType)) {
investment = new Bond();
} else if ("Equity".equals(investmentType)) {
investment = new Equity();
} else {
// throw exception
}
return investment;
}
}
以及以下内容@RestController：
@RestController
public class InvestmentsRestController {
private InvestmentRepository investmentRepository;
@Autowired
public InvestmentsRestController(InvestmentRepository investmentRepository) {
this.investmentRepository = investmentRepository;
}
@RequestMapping(RequestMethod.POST)
public List<Investment> update(@RequestBody List<Investment> investments) {
return investmentRepository.update(investments);
}
}
以及请求正文中的以下 json：
[
{"investmentType":"Bond"},
{"investmentType":"Equity"}
]
如何在List<Investment> 不使用 Jackson 的@JsonSubTypes抽象类的情况下将 json 绑定或转换为请求正文Investment，而是使用InvestmentFactory?
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