fastJSON字符串类型数据中的日期转换为Java bean的日期对象

Person.java

import java.io.Serializable;

import java.util.Date;

public class Person implements Serializable {

private String name;

private Date birthday;

private Date createDate;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Date getBirthday() {

return birthday;

}

public void setBirthday(Date birthday) {

this.birthday = birthday;

}

public Date getCreateDate() {

return createDate;

}

public void setCreateDate(Date createDate) {

this.createDate = createDate;

}

}

Test.java

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.JSONObject;

import com.alibaba.fastjson.TypeReference;

import java.text.SimpleDateFormat;

public class Test {

public static void main(String[] args) {

String personJSONStr="{\"name\":\"exampleName\",\"birthday\":\"2012-04-02\",\"createDate\":\"2018.09.22\"}";

JSONObject jsonObject= JSON.parseObject(personJSONStr);

Person person=jsonObject.toJavaObject(new TypeReference(){});

System.out.println(new SimpleDateFormat("yyyMMdd").format(person.getCreateDate()));

}

}

输出:

Connected to the target VM, address: '127.0.0.1:64532', transport: 'socket'

Disconnected from the target VM, address: '127.0.0.1:64532', transport: 'socket'

Exception in thread "main" com.alibaba.fastjson.JSONException: For input string: "2018.09.22"

at com.alibaba.fastjson.util.TypeUtils.castToJavaBean(TypeUtils.java:1048)

at com.alibaba.fastjson.util.TypeUtils.cast(TypeUtils.java:692)

at com.alibaba.fastjson.util.TypeUtils.cast(TypeUtils.java:858)

at com.alibaba.fastjson.JSON.toJavaObject(JSON.java:1019)

at Test.main(Test.java:11)

Caused by: java.lang.NumberFormatException: For input string: "2018.09.22"

at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)

at java.lang.Long.parseLong(Long.java:589)

at java.lang.Long.parseLong(Long.java:631)

at com.alibaba.fastjson.util.TypeUtils.castToDate(TypeUtils.java:336)

at com.alibaba.fastjson.util.TypeUtils.castToDate(TypeUtils.java:275)

at com.alibaba.fastjson.util.TypeUtils.cast(TypeUtils.java:747)

at com.alibaba.fastjson.util.TypeUtils.cast(TypeUtils.java:858)

at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.createInstance(JavaBeanDeserializer.java:1180)

at com.alibaba.fastjson.util.TypeUtils.castToJavaBean(TypeUtils.java:1046)

... 4 more

Process finished with exit code 1

解决办法:

修改person类:

import com.alibaba.fastjson.annotation.JSONField;

import java.io.Serializable;

import java.util.Date;

public class Person implements Serializable {

private String name;

@JSONField(format = "yyyy-MM-dd")

private Date birthday;

@JSONField(format = "yyyy.MM.dd")

private Date createDate;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Date getBirthday() {

return birthday;

}

public void setBirthday(Date birthday) {

this.birthday = birthday;

}

public Date getCreateDate() {

return createDate;

}

public void setCreateDate(Date createDate) {

this.createDate = createDate;

}

}