Question

我试图使用Postman发布json并获取内部服务器错误。我认为问题在于解析json时，因为在发布I＆＃39; m时，传递一个包含嵌套变量的对象。

订单类：

public class Order {

        private long order_id;
        private long user_id;
        private List<OrderDetails> items;
        private Date order_date;
        private Double total;
        private String status;
        ......
}

OrderDetails类：

public class OrderDetails {

    private Product product;
    private Integer quantity;
    ......
}

产品类别：

public class Product {

    private long prodId;
    private String prodName;
    private String prodDesc;
    private float price;
    .......
}

OrderResource类：我甚至不调用这个方法，因为当我将数据作为字符串传递并将参数更改为字符串时，它将进入调用并在控制台上显示它。但当我再次将其更改为Order时，它会抛出MessageBodyWriter not found for media type=application/json, type=class java.util.HashMap, genericType=class java.util.HashMap.

@POST
    public Response insertorder(Order order, @Context UriInfo uriInfo) throws ApplicationException {
            if (!order.isValid()) {
            throw new ApplicationException("Order is invalid!");
        }

            System.out.println("Order details in Resource: "+order.getUser_id());

        Order response = new OrderDAO().InsertOrder(order);
        String newId = String.valueOf(response.getOrder_id());
        URI url = uriInfo.getAbsolutePathBuilder().path(newId).build();

        return Response.created(url)
                    .status(Status.CREATED)
                    .entity(response)
                    .build();
    }

OrderDAO类：

public Order InsertOrder(Order order) 
{
    Connection connection = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    connection = connect();
    double total=0;
    for(OrderDetails od: order.getItems()) {
        total += od.getProduct().getPrice() * od.getQuantity();
    }

    Order ret = null;

    try {
        pstmt = connection.prepareStatement("INSERT INTO main.orders_table(\n" + 
                "            user_id, order_date, total,status)\n" + 
                "    VALUES (?, ?, ?)",Statement.RETURN_GENERATED_KEYS);    
        pstmt.setLong(1, order.getUser_id());
        pstmt.setDate(2, (Date) order.getOrder_date());
        pstmt.setDouble(3,total);
        pstmt.setString(4,"pending");

        int affectedRows = pstmt.executeUpdate();

        if (affectedRows == 0) {
            throw new SQLException("Creating user failed, no rows affected.");
        }

        try (ResultSet generatedKeys = pstmt.getGeneratedKeys()) {
            if (generatedKeys.next()) {
                System.out.println("Inserted Order Id: "+generatedKeys.getLong(1));
                order.setOrder_id(generatedKeys.getLong(1)); //setting the Order ID to the inserted row Id
            }
            else {
                throw new SQLException("Creating user failed, no ID obtained.");
            }
        }

        ret = new Order(order.getOrder_id(),order.getUser_id(),order.getOrder_date(),order.getTotal(),order.getStatus());
    } 
    catch (Exception e) 
        {
            System.out.println("Error while inserting Order:" + e);
            e.printStackTrace();

        } finally {
            close(connection, pstmt, rs);
        }
    return ret;
}

Json String穿过Postman：

{
        "items": [
            {
                "product": {
                    "price": 2,
                    "prodDesc": "Pakistani Orange",
                    "prodId": 1002,
                    "prodName": "ORANGE"
                },
                "quantity": 5
            },
            {
                "product": {
                    "price": 3,
                    "prodDesc": "Kashmir Apple",
                    "prodId": 1001,
                    "prodName": "APPLE"
                },
                "quantity": 5
            }
        ],
        "order_date": "2008-07-06T00:00:00+08:00",
        "user_id": 2
    }

有人可以帮助我解决这个问题。 TIA

Answer 1

由于您使用的是Response，Order等类，因此您需要提及@consumes和@produces。尝试使用Put方法，虽然Post仍然可以在这里工作。

还要正确配置邮递员，提及Content-Type，Accept as application / json each。

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Master" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="10 empty rows"/>
    <detail>
        <band height="20" splitType="Stretch">
            <textField>
                <reportElement x="0" y="0" width="100" height="20"/>
                <textFieldExpression><![CDATA[$V{REPORT_COUNT}]]></textFieldExpression>
            </textField>
            <subreport>
                <reportElement x="130" y="0" width="200" height="20"/>
                <subreportParameter name="evenRow">
                    <subreportParameterExpression><![CDATA[($V{REPORT_COUNT}  % 2 == 0 ?  1 :  0)]]></subreportParameterExpression>
                </subreportParameter>
                <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JREmptyDataSource()]]></dataSourceExpression>
                <subreportExpression><![CDATA["Subreport.jasper"]]></subreportExpression>
            </subreport>
        </band>
    </detail>
</jasperReport>

Jax-Rs + Jersey @Post深度嵌套对象抛出内部服务器错误

1 个答案: