用java代码实现以下功能（新增监控提示信息生成服务，每日依据“监控规则类别”属性为“业务办理时限监控”的监控规则，检索7日内达到办理时限的业务，分别对每个业务办理人员生成提示信息。提示信息内容包括类型、预警（提示）信息、业务数据、信息生成时间、提示对象。生成规则如下： 类型：填写“提示”。 预警（提示）信息：填写“存在7日内必须办理的业务，请尽快办理。”。 业务数据：填写业务数据快照信息。 信息生成时间：填写生成预警信息的时间，格式为yyyy-mm-dd hh:mm:ss。 提示对象：填写业务办理人员（软件用户）姓名。）

public class NotificationService {

public void generateNotifications() {
List<BusinessTransaction> businessTransactions = retrieveBusinessTransactions();
for (BusinessTransaction businessTransaction : businessTransactions) {
if (isEligibleForNotification(businessTransaction)) {
User user = businessTransaction.getUser();
String notificationMessage = buildNotificationMessage(businessTransaction);
Notification notification = new Notification("提示", notificationMessage, getCurrentDateAndTime(), user.getName());
sendNotification(notification);
}
}
}

private List<BusinessTransaction> retrieveBusinessTransactions() {
// retrieve business transactions for the past 7 days with "业务办理时限监控" rule category
}

private boolean isEligibleForNotification(BusinessTransaction businessTransaction) {
// check if business transaction is still pending and business transaction date is within the next 7 days
}

private String buildNotificationMessage(BusinessTransaction businessTransaction) {
StringBuilder messageBuilder = new StringBuilder();
messageBuilder.append("存在7日内必须办理的业务，请尽快办理。\n");
messageBuilder.append("业务数据：").append(businessTransaction.getSnapshot()).append("\n");
return messageBuilder.toString();
}

private String getCurrentDateAndTime() {
// get current date and time in yyyy-mm-dd hh:mm:ss format
}

private void sendNotification(Notification notification) {
// send notification to user
}

}

class BusinessTransaction {
private User user;
private String snapshot;
private Date transactionDate;
private String ruleCategory;
private String status;

// getters and setters
}

class User {
private String name;

// getter and setter
}

class Notification {
private String type;
private String message;
private String timestamp;
private String recipient;

// constructor, getters and setters
}