postman测试接口,参数List<Entity>出现错误

Entity:

@Document
public class InvestmentRequirement {
	@Id
	private String id;
	private List<Industry> industries;
	

controller:

public ResponseEntity<InvestmentRequirement> save(
			@ModelAttribute @Valid InvestmentRequirement investmentRequirement,
			@RequestParam String industries)
	                throws Exception {

service：

List<Industry> industry = objectMapper.readValue(industries, new TypeReference<List<Industry>>() {
		});

postman:

industries字段给值

[{
"industry":"adssadf",
"category1":"asads",
"category2":"112345",
"category3":"test"
},

{
"industry":"adssadf",
"category1":"asads",
"category2":"112345",
"category3":"test"
}

]

原因：

由于@ModelAttribute @Valid InvestmentRequirement investmentRequirement会自动生成一个实体，就要给实体里边的属性赋值，所以就会出现类型转换异常。

本来应该是要在servece里边进行类型转换的，但是由于有@ModelAttribute注解，所以就会在请求时出现异常

解决方法：

将controller中的industries改个名字，使得在创建investmentRequirement时，industries字段为空，然后再由@RequestParam String industriesStr取值。service中处理

List<Industry> industry = objectMapper.readValue(industriesStr, new TypeReference<List<Industry>>() {
		});

并赋值。