1、日期转换默认格式覆盖注解格式的bug；
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com.alibaba.fastjson.serializer.JSONSerializer#writeWithFormat
修改后的代码：
public final void writeWithFormat(Object object, String format) {
if (object instanceof Date) {
DateFormat dateFormat = this.getDateFormat();
if(format!=null){
dateFormat = new SimpleDateFormat(format, locale);
dateFormat.setTimeZone(timeZone);
}
String text = dateFormat.format((Date) object);
out.writeString(text);
return;
}
write(object);
}2、解决转JSON时候Bean字段默认被排序的毛病：
com.alibaba.fastjson.serializer.SerializeWriter#computeFeatures
修改的代码：
protected void computeFeatures() {
quoteFieldNames = (this.features & SerializerFeature.QuoteFieldNames.mask) != 0;
useSingleQuotes = (this.features & SerializerFeature.UseSingleQuotes.mask) != 0;
// sortField = (this.features & SerializerFeature.SortField.mask) != 0;
sortField = false;
disableCircularReferenceDetect = (this.features & SerializerFeature.DisableCircularReferenceDetect.mask) != 0;
beanToArray = (this.features & SerializerFeature.BeanToArray.mask) != 0;
writeNonStringValueAsString = (this.features & SerializerFeature.WriteNonStringValueAsString.mask) != 0;
notWriteDefaultValue = (this.features & SerializerFeature.NotWriteDefaultValue.mask) != 0;
writeEnumUsingName = (this.features & SerializerFeature.WriteEnumUsingName.mask) != 0;
writeEnumUsingToString = (this.features & SerializerFeature.WriteEnumUsingToString.mask) != 0;
writeDirect = quoteFieldNames //
&& (this.features & nonDirectFeautres) == 0 //
&& (beanToArray || writeEnumUsingName)
;
keySeperator = useSingleQuotes ? '\'' : '"';
}