ObjectMapper 的使用和常用注解 过滤条件

package cn.com.log.demo;

import java.io.Serializable;
import java.util.Date;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.annotate.JsonProperty;

@JsonIgnoreProperties({"sex","addTime"})  //序列化时忽略的属性名称集合  ，加载类上，给出的属性都不序列化
public class student implements Serializable{
/**
* @Fields serialVersionUID :
*/
private static final long serialVersionUID = -6510230638877789163L;
@JsonProperty("stu_id")	//序列化时，如果要修改某些属性的名字，可以使用, 序列化 将id改为 stu_id
private Integer id ;
@JsonIgnore		//序列化时忽略字段，可以加载 属性上 、方法上
private String name ;
private Integer age ;

private String sex;
private Date addTime ;
public Date getAddTime() {
return addTime;
}
public void setAddTime(Date addTime) {
this.addTime = addTime;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}

}

package cn.com.log.demo;

import java.io.IOException;

import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;

public class testjson {

private static final ObjectMapper MAPPER = new ObjectMapper();

public static void main(String[] args) throws JsonGenerationException, JsonMappingException, IOException {

// 序列化时  ，属性值为null的忽略
MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
/*
2.代码上
ObjectMapper mapper = new ObjectMapper();

mapper.setSerializationInclusion(Include.NON_NULL);

//通过该方法对mapper对象进行设置，所有序列化的对象都将按改规则进行系列化
//Include.Include.ALWAYS 默认
//Include.NON_DEFAULT 属性为默认值不序列化
//Include.NON_EMPTY 属性为 空（“”） 或者为 NULL 都不序列化
//Include.NON_NULL 属性为NULL 不序列化

User user = new User(1,"",null);
String outJson = mapper.writeValueAsString(user);
System.out.println(outJson);

注意：只对VO起作用，Map List不起作用
*/

student stu = new student();
stu.setName("aaav");

String data = MAPPER.writeValueAsString(stu);
System.out.println(data);

}
}

FAIL_ON_UNKNOWN_PROPERTIES

JsonMappingException