使用Jackson的BeanPropertyFilter过滤嵌套对象 [英] Filter nested objects using Jackson's BeanPropertyFilter

问题描述

我有以下对象：

@JsonFilter("myFilter")
public class Person {
    private Name name;
    private int age;
    public Name getName() {return name;}
    public void setName(Name name) {this.name = name;}
    public int getAge() {return age;}
    public void setAge(int age) {this.age = age;}
}

@JsonFilter("myFilter")
public class Name {
    private String firstName;
    private String lastName;
    public String getFirstName() {return firstName;}
    public void setFirstName(String firstName) {this.firstName = firstName;}
    public String getLastName() {return lastName;}
    public void setLastName(String lastName) {this.lastName = lastName;}

}

我编写了一个方法来对这样的Person对象进行编组：

I wrote a method to marshall a Person object like this:

@Test
public void test() throws Exception {

    Person person = new Person();
    person.setAge(10);
    Name name = new Name();
    name.setFirstName("fname");
    name.setLastName("lastname");
    person.setName(name);

    ObjectMapper mapper = new ObjectMapper();

    FilterProvider filters = new SimpleFilterProvider().addFilter("myFilter",
            SimpleBeanPropertyFilter.filterOutAllExcept("name.firstName"));

    System.out.println(mapper.filteredWriter(filters).writeValueAsString(person));

}

我希望看到的是这样的JSON：

What I'd like to see is JSON like this:

{"name":{"firstName":"fname"}}

有可能吗？

推荐答案

好的， 弄清楚了。 Varargs会让这个更漂亮，但是哦。只是希望我没有两个具有相同名称属性的内部bean。我无法区分两个

Ok, figured it out. Varargs would have made this a bit prettier, but oh well. Just hope I don't have two inner beans which have properties with the same name. I wouldn't be able to make the distinction between the two

    FilterProvider filters = new SimpleFilterProvider()
            .addFilter("myFilter", SimpleBeanPropertyFilter
                    .filterOutAllExcept(new HashSet<String>(Arrays
                            .asList(new String[] { "name", "firstName" }))));

这篇关于使用Jackson的BeanPropertyFilter过滤嵌套对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！