JXPathContext支持迷糊匹配

看完例子就会了

public class Person {
	private String name;

	private int age;

	/**
	 * 
	 */
	public Person() {

	}

	public Person(String name) {
		this.name = name;
	}

	public Person(String name, int age) {
		this.name = name;
		this.age = age;
	}

	/**
	 * @return the name
	 */
	public String getName() {
		return name;
	}

	/**
	 * @param name the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}

	/**
	 * @return the age
	 */
	public int getAge() {
		return age;
	}

	/**
	 * @param age the age to set
	 */
	public void setAge(int age) {
		this.age = age;
	}

	/**
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return "name:" + (this.name == null ? "" : name) + " age:" + this.age;
	}

	public static void main(String[] args) {
		List<Person> persons = new ArrayList<Person>();
		persons.add(new Person("Json", 20));
		persons.add(new Person("JSON", 21));
		persons.add(new Person("jacson", 22));

		JXPathContext context = JXPathContext.newContext(persons);
		context.setLenient(true);
		context.setFunctions(new ClassFunctions(String.class, "string"));

		String match = "Js".toLowerCase();

		for (Iterator<?> iterator = context.iterate("/.[contains(string:toLowerCase(name),\'" + match + "\')]"); iterator
				.hasNext();) {
			System.out.println(((Person) iterator.next()).toString());
		}
	}
}

关键点
1.context.setFunctions(new ClassFunctions(String.class, "string"));
参数String.class：将String类中的方法注入到context中
参数string:方法的命名空间，下面会用string:+方法名的方式调用对应方法

2.查询关键字match转换成小写

3.context.iterate("/.[contains(string:toLowerCase(name),\'" + match + "\')]");
使用String.toLowerCase将Person对象的name属性转换成小写，然后与match匹配


例子中打印结果如下：
name:Json age:20
name:JSON age:21