一、jackson的maven依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.5.3</version>
</dependency>

二、实体类的建立

import com.fasterxml.jackson.annotation.JsonIgnore;


public class Person {
	private Integer id;
	private String name;
	@JsonIgnore
	private String hobbies;//兴趣爱好

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getHobbies() {
		return hobbies;
	}

	public void setHobbies(String hobbies) {
		this.hobbies = hobbies;
	}

	@Override
	public String toString() {
		return "Person [id=" + id + ", name=" + name + ", hobbies=" + hobbies + "]";
	}

}

三、测试类代码：

import java.io.IOException;

import com.fasterxml.jackson.databind.ObjectMapper;

public class JSONTest {
	public static void main(String[] args) throws IOException {
		Person p = new Person();
		p.setId(1001);
		p.setName("huangbaokang");
		p.setHobbies("篮球");
		// 未加@JsonIgnore注解时，控制台打印输出{"id":1001,"name":"huangbaokang","hobbies":"篮球"}
		// 加上@JsonIgnore注解时，控制台输出了{"id":1001,"name":"huangbaokang"}，把hobbies的值过滤了。
		System.out.println(new ObjectMapper().writeValueAsString(p));
	}
}