urlencode 形式的泽西 Joda Time ISO 8601 参数

Question

我正在使用 Jersey: 1.17.1 并定义了一个接受“application/x-www-form-urlencoded”的 REST 服务。我想接受 ISO-8601 格式的参数“b”，并让 Jersey 将其映射到 Joda DateTime。

@PUT
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public Response createTask(@FormParam("a") String a, @FormParam("b") DateTime b) {
...

但是我遇到了这个异常

SEVERE: The following errors and warnings have been detected with resource and/or provider classes:
SEVERE: Missing dependency for method public de.ast.mae.rest.util.response.Response de.ast.mae.rest.service.tasks.TasksAdminRestService.createTask(java.lang.String,org.joda.time.DateTime) at parameter at index 6
SEVERE: Missing dependency for method public de.ast.mae.rest.util.response.Response de.ast.mae.rest.service.tasks.TasksAdminRestService.createTask(java.lang.String,org.joda.time.DateTime) at parameter at index 6
SEVERE: Method, public de.ast.mae.rest.util.response.Response de.ast.mae.rest.service.tasks.TasksAdminRestService.createTask(java.lang.String,java.lang.String,org.joda.time.DateTime), annotated with PUT of resource, class de.ast.mae.rest.service.tasks.TasksAdminRestService, is not recognized as valid resource method.
Okt 09, 2013 5:54:41 PM com.sun.jersey.spi.spring.container.servlet.SpringServlet initiate
SEVERE: Exception occurred when intialization
com.sun.jersey.spi.inject.Errors$ErrorMessagesException
at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)

我需要做什么才能使这项工作成功？

答案是:我首先升级到 JAX-RS 2.0，然后使用:

@Provider
public class DateTimeParamConverterProvider implements ParamConverterProvider {

    @Override
    public <T> ParamConverter<T> getConverter(Class<T> type, Type genericType, Annotation[] annotations) {
        if (type.equals(DateTime.class)) {
            return (ParamConverter<T>) new DateTimeParamConverter();
        } else {
            return null;
        }

    }

    private static class DateTimeParamConverter implements ParamConverter<DateTime> {
        @Override
        public DateTime fromString(String value) {
            try {
                return ISODateTimeFormat.dateTimeNoMillis().parseDateTime(value);
            } catch (IllegalArgumentException e) {
                return ISODateTimeFormat.dateTime().parseDateTime(value);
            }
        }

        @Override
        public String toString(DateTime value) {
            return value.toString();
        }

    }
}

Answer 1

您可以使用下一个解决方案:

@PUT
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public Response createTask(@FormParam("a") String a, @FormParam("b") String b) 
{
   final DateTime date = ISODateTimeFormat.basicDate().parse(b);
   // ...

basicDate() 的格式为 yyyyMMdd。
您可以找到适合您案例的格式 here
编辑
来自 Jersey Documentation

In general the Java type of the method parameter may:

1. Be a primitive type;

2. Have a constructor that accepts a single String argument;

3. Have a static method named valueOf or fromString that accepts a single String argument (see, for example, Integer.valueOf(String) and java.util.UUID.fromString(String));

4. Have a registered implementation of javax.ws.rs.ext.ParamConverterProvider JAX-RS extension SPI that returns a javax.ws.rs.ext.ParamConverter instance capable of a "from string" conversion for the type. or

5. Be List, Set or SortedSet, where T satisfies 2 or 3 above. The resulting collection is read-only.

因此，可能的解决方案是 2 和 4。\

创建类ISODateAsString并使用is作为参数

public class ISODateAsString
{
   DateTime dateTime;
   public DateAsString(String date)
   {
      dateTime= ISODateTimeFormat.basicDate().parse(date);
   }
   //...
}  

或者使用ParamConverterProvider和ParamConverter