Question

我正在尝试制作一个程序，它将整齐地打印我收件箱的所有邮件正文，但交换Web服务使其变得困难。我似乎可以轻松访问除消息正文之外的所有内容。这就是我现在正在做的事情

static final int SIZE = 10;
public static void main(String [] args) throws Exception {
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010);

ExchangeCredentials credentials = new WebCredentials("USERNAME","PASS");
service.setCredentials(credentials);
service.setUrl(new URI("https://MY_DOMAIN/ews/exchange.asmx"));

ItemView view = new ItemView (SIZE);
FindItemsResults<Item> findResults = service.findItems(WellKnownFolderName.Inbox, view);
System.out.println(findResults.getItems().size() + "Messages");


for (int i = 0; i < SIZE; ++i) {
    try {
        Item item = findResults.getItems().get(i);
    System.out.println("SUBJECT: " + item.getSubject());
    System.out.println("TO: " + item.getDisplayTo());
    System.out.println("BODY: " + item.getBody().toString());


    } catch (IndexOutOfBoundsException e) {
        break;
    }


}

当然，我的代码填写了我的凭据和域名。当我运行这个时，我收到了这条消息。

Exception in thread "main" microsoft.exchange.webservices.data.ServiceObjectPropertyException: You must load or assign this property before you can read its value.
    at microsoft.exchange.webservices.data.PropertyBag.getPropertyValueOrException(Unknown Source)
    at microsoft.exchange.webservices.data.PropertyBag.getObjectFromPropertyDefinition(Unknown Source)
    at microsoft.exchange.webservices.data.Item.getBody(Unknown Source)
    at Main.main(Main.java:26)

第26行是我尝试打印身体的行。我做错了什么？

Answer 1

FindItem操作不会返回消息正文，因此您需要向服务器发出单独的GetItem请求以获取此消息。在Managed API中，您应该能够使用Load方法执行此操作，只需更改

即可

Item item = findResults.getItems().get(i);
item.Load()

干杯格伦

Answer 2

我实际上已经弄明白了。看起来ExchangeService将在完成拉动所需信息后关闭连接。解决这个问题我做了一个功能

private static ExchangeService getService() throws Exception {
    ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010);
    ExchangeCredentials credentials = new WebCredentials("USERNAME","PASS");
    service.setCredentials(credentials);
    service.setUrl(new URI("DOMAIN"));
    return service;
}

然后我就这样调用load

getService().loadPropertiesForItems(findResults, itempropertyset);

我将itempropertyset定义为

PropertySet itempropertyset = new PropertySet(BasePropertySet.FirstClassProperties);
itempropertyset.setRequestedBodyType(BodyType.Text);
view.setPropertySet(itempropertyset);

打印邮件正文

2 个答案: