java - JEE Restful 将 JSON 绑定(bind)到 JAVA

Question

我们正在开发一个 Java EE 项目，需要公开一个使用 JSON 的 RESTFul Web 服务。不幸的是，我无法将 JSON 参数绑定(bind)到 Http-POST 请求中的 Java 对象。你能帮我吗？

服务类别:

@Path("claimserviceNew")
public class SlsiRestServicesNew {

@POST
@Consumes({"application/xml", "application/json"})
@Produces(MediaType.APPLICATION_JSON)
public String registerClaimWithPaymentNew( Mandant mandant, Vertrag vertrag){

    return mandant.getCode() + " new ";
}

}

Mandant 类:

@XmlRootElement(name="mandant")
@XmlAccessorType(XmlAccessType.FIELD)
public class Mandant {


    @XmlAttribute(required=true)
    private String code;


    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

}

Vertrag 类:

@XmlRootElement(name="vertrag")
@XmlAccessorType(XmlAccessType.FIELD)
public class Vertrag {

    @XmlAttribute(required=true)
    private String polizzenNummer;

    public String getPolizzenNummer() {
        return polizzenNummer;
    }

    public void setPolizzenNummer(String polizzenNummer) {
        this.polizzenNummer = polizzenNummer;
    }

}

我的 HTTP Post 请求中的两个 JSON 参数:

{   { 
        "code": "SLV"
    },

     { 
        "polizzenNummer": "1234"
     }

}

服务器异常:

Caused by: org.codehaus.jackson.JsonParseException: Unexpected character ('{' (code 123)): was expecting double-quote to start field name
 at [Source: org.apache.catalina.connector.CoyoteInputStream@cce46; line: 1, column: 6]
    at org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1433) [jackson-core-asl-1.9.9-redhat-2.jar:1.9.9-redhat-2]

Answer 1

您的 REST 方法只能通过 Json 绑定(bind)接收一个对象。在这种情况下，您可能希望创建一个封装两者的对象:

public class MyInput {
   private Vertrag vertrag;
   private Mandant mandant;
   // .. getters and setters
}

然后您会在 REST 方法中收到此消息:

@POST
@Consumes({"application/xml", "application/json"})
@Produces(MediaType.APPLICATION_JSON)
public String registerClaimWithPaymentNew(MyInput input){

    return input.getMandant().getCode() + " new ";
}