fastjson转换英文格式日期包数字转换异常处理

说明：用到的fastjson版本是：fastjson-1.2.17

实体类：

package com.test;

import java.util.Date;

public class User {
private Integer id;
private String name;
private Date createDate;

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 Date getCreateDate() {
return createDate;
}

public void setCreateDate(Date createDate) {
this.createDate = createDate;
}

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

}

调用代码

public static void main(String[] args) throws ParseException {
String json = "[{\"id\":1000,\"name\":\"张三\",\"createDate\":\"Nov 24, 2016 2:54:26 PM\"},{\"id\":1000,\"name\":\"张三\",\"createDate\":\"Nov 24, 2016 2:54:26 PM\"}]";
List<User> users = JSONArray.parseArray(json, User.class);
System.out.println(users);
}

报错信息类似如下：

Exception in thread "main" java.lang.NumberFormatException: For input string: "Nov 24, 2016 2:54:26 PM"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at com.alibaba.fastjson.serializer.DateCodec.cast(DateCodec.java:202)
at
com.alibaba.fastjson.parser.deserializer.AbstractDateDeserializer.deserialze(AbstractDateDeserializer.java:150)
at com.alibaba.fastjson.parser.deserializer.DefaultFieldDeserializer.parseField(DefaultFieldDeserializer.java:66)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseField(JavaBeanDeserializer.java:722)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:568)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:187)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:183)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(DefaultJSONParser.java:708)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(DefaultJSONParser.java:644)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(DefaultJSONParser.java:639)
at com.alibaba.fastjson.JSON.parseArray(JSON.java:503)
at com.test.Main.main(Main.java:39)

解决方法如下(找到日期对应的源码解析类)：

package com.alibaba.fastjson.parser.deserializer;

import java.lang.reflect.Type;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Locale;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.Feature;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONScanner;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.util.TypeUtils;

public abstract class AbstractDateDeserializer extends ContextObjectDeserializer implements ObjectDeserializer {

public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
return deserialze(parser, clazz, fieldName, null, 0);
}

@Override
@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName, String format, int features) {
JSONLexer lexer = parser.lexer;

Object val;
if (lexer.token() == JSONToken.LITERAL_INT) {
val = lexer.longValue();
lexer.nextToken(JSONToken.COMMA);
} else if (lexer.token() == JSONToken.LITERAL_STRING) {
String strVal = lexer.stringVal();

if (format != null) {
SimpleDateFormat simpleDateFormat = null;
try {
simpleDateFormat = new SimpleDateFormat(format);
} catch (IllegalArgumentException ex) {
if (format.equals("yyyy-MM-ddTHH:mm:ss.SSS")) {
format = "yyyy-MM-dd'T'HH:mm:ss.SSS";
simpleDateFormat = new SimpleDateFormat(format);
} else  if (format.equals("yyyy-MM-ddTHH:mm:ss")) {
format = "yyyy-MM-dd'T'HH:mm:ss";
simpleDateFormat = new SimpleDateFormat(format);
}
}

try {
val = simpleDateFormat.parse(strVal);
} catch (ParseException ex) {
if (format.equals("yyyy-MM-dd'T'HH:mm:ss.SSS") //
&& strVal.length() == 19) {
try {
val = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss").parse(strVal);
} catch (ParseException ex2) {
// skip
val = null;
}
} else {
**//====这里添加日期转换代码=====**
**//====这里添加日期转换代码=====**
**//====这里添加日期转换代码=====**
**//====这里添加日期转换代码=====**
try {
SimpleDateFormat ssddff = new SimpleDateFormat("MMM dd, yyyy hh:mm:ss aa", Locale.ENGLISH);
val = ssddff.parse(strVal);
} catch (ParseException e) {
// skip
val = null;
}
}
}
} else {
val = null;
}

if (val == null) {
val = strVal;
lexer.nextToken(JSONToken.COMMA);

if (lexer.isEnabled(Feature.AllowISO8601DateFormat)) {
JSONScanner iso8601Lexer = new JSONScanner(strVal);
if (iso8601Lexer.scanISO8601DateIfMatch()) {
val = iso8601Lexer.getCalendar().getTime();
}
iso8601Lexer.close();
}
}
} else if (lexer.token() == JSONToken.NULL) {
lexer.nextToken();
val = null;
} else if (lexer.token() == JSONToken.LBRACE) {
lexer.nextToken();

String key;
if (lexer.token() == JSONToken.LITERAL_STRING) {
key = lexer.stringVal();

if (JSON.DEFAULT_TYPE_KEY.equals(key)) {
lexer.nextToken();
parser.accept(JSONToken.COLON);

String typeName = lexer.stringVal();
Class<?> type = TypeUtils.loadClass(typeName, parser.getConfig().getDefaultClassLoader());
if (type != null) {
clazz = type;
}

parser.accept(JSONToken.LITERAL_STRING);
parser.accept(JSONToken.COMMA);
}

lexer.nextTokenWithColon(JSONToken.LITERAL_INT);
} else {
throw new JSONException("syntax error");
}

long timeMillis;
if (lexer.token() == JSONToken.LITERAL_INT) {
timeMillis = lexer.longValue();
lexer.nextToken();
} else {
throw new JSONException("syntax error : " + lexer.tokenName());
}

val = timeMillis;

parser.accept(JSONToken.RBRACE);
} else if (parser.getResolveStatus() == DefaultJSONParser.TypeNameRedirect) {
parser.setResolveStatus(DefaultJSONParser.NONE);
parser.accept(JSONToken.COMMA);

if (lexer.token() == JSONToken.LITERAL_STRING) {
if (!"val".equals(lexer.stringVal())) {
throw new JSONException("syntax error");
}
lexer.nextToken();
} else {
throw new JSONException("syntax error");
}

parser.accept(JSONToken.COLON);

val = parser.parse();

parser.accept(JSONToken.RBRACE);
} else {
val = parser.parse();
}

return (T) cast(parser, clazz, fieldName, val);
}

protected abstract <T> T cast(DefaultJSONParser parser, Type clazz, Object fieldName, Object value);
}

这样改还是有问题，还是会报数之前的错，还需要在实体类上加注解@JSONField(format=”yyyy-MM-dd”)，修改后代码如下：

package com.test;

import java.util.Date;

import com.alibaba.fastjson.annotation.JSONField;

public class User {
private Integer id;

private String name;
@JSONField(format="yyyy-MM-dd")
private Date createDate;

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 Date getCreateDate() {
return createDate;
}

public void setCreateDate(Date createDate) {
this.createDate = createDate;
}

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

}

然后再运行代码就可以正常通过了

具体如何改源码，可以通过maven将源码下载下来，自己新建一个工程将源码导入到新建的工程中，直接修改即可。（报错无需理会，直接忽略即可）

修改后的代码打成一个jar，放到自己的项目中即可正常使用。

项目截图：



源码位置：