import javax.mail.search.FromStringTerm; //导入依赖的package包/类
private SearchTerm createFieldSearchTerm(String f) {
    switch (f.toLowerCase()) {
        case "from":
            return new FromStringTerm(matchingText);
        case "cc":
            return new RecipientStringTerm(Message.RecipientType.CC, matchingText);
        case "to":
            return new RecipientStringTerm(Message.RecipientType.TO, matchingText);
        case "body":
            return new BodyTerm(matchingText);
        case "subject":
            return new SubjectTerm(matchingText);
        default:
            return null;
    }
}
 

import javax.mail.search.FromStringTerm; //导入依赖的package包/类
@Test
public void multipleFieldsShouldReturnOrTerm() {
    final Set fields = new HashSet();
    fields.add("to");
    fields.add("from");
    fields.add("cc");

    Rule rule = Rule.create()
            .sourceFolder("INBOX")
            .matchingText("testText")
            .fields(fields);
    SearchTerm term = rule.getSearchTerm();
    Assert.assertTrue(term instanceof OrTerm);
    SearchTerm[] terms = ((OrTerm) term).getTerms();
    for (SearchTerm t : terms) {
        Assert.assertTrue(t instanceof FromStringTerm
                || (t instanceof RecipientStringTerm && ((RecipientStringTerm) t).getRecipientType() == Message.RecipientType.CC)
                || (t instanceof RecipientStringTerm && ((RecipientStringTerm) t).getRecipientType() == Message.RecipientType.TO));
    }
}
 

import javax.mail.search.FromStringTerm; //导入依赖的package包/类
/**
* Set filter on message sender.
* @param sender messages will be filtered on sender
* @param notTerm negate condition
*/
  public void setSenderTerm(String sender, boolean notTerm) {
  	if (!Const.isEmpty(sender)) {
  		if(notTerm)
  			addSearchTerm(new NotTerm(new FromStringTerm(sender)));
  		else
  			addSearchTerm(new FromStringTerm(sender));
  	}
  }
 

import javax.mail.search.FromStringTerm; //导入依赖的package包/类
/**
 * Set filter on message sender.
 *
 * @param sender
 *          messages will be filtered on sender
 * @param notTerm
 *          negate condition
 */
public void setSenderTerm( String sender, boolean notTerm ) {
  if ( !Utils.isEmpty( sender ) ) {
    if ( notTerm ) {
      addSearchTerm( new NotTerm( new FromStringTerm( sender ) ) );
    } else {
      addSearchTerm( new FromStringTerm( sender ) );
    }
  }
}
 

import javax.mail.search.FromStringTerm; //导入依赖的package包/类
public SearchTermBuilder from(Op op, String pattern) {
    SearchTerm st = new FromStringTerm(pattern);
    addTerm(op, st);
    return this;
}