@JsonIgnore注解的使用

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

package cn.bjjs;

import org.apache.commons.lang3.builder.ToStringBuilder;

import com.fasterxml.jackson.annotation.JsonIgnore;
/**
 * 实体类
 * @author nxd
 *
 */
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 ToStringBuilder.reflectionToString(this);
	}

}

三、测试类代码：

package cn.bjjs;
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));
    }
}