希望这对其他人有帮助。我需要做一些类似的事情,在我的第一个拆分消息之后,我想抑制标题输出。这是一个完整的类('FieldUtils' 是 apache commons lib 的一部分)
package com.routes;
import java.io.OutputStream;
import org.apache.camel.Exchange;
import org.apache.camel.dataformat.bindy.BindyAbstractFactory;
import org.apache.camel.dataformat.bindy.BindyCsvFactory;
import org.apache.camel.dataformat.bindy.BindyFactory;
import org.apache.camel.dataformat.bindy.FormatFactory;
import org.apache.camel.dataformat.bindy.csv.BindyCsvDataFormat;
import org.apache.commons.lang3.reflect.FieldUtils;
public class StreamingBindyCsvDataFormat extends BindyCsvDataFormat {
public StreamingBindyCsvDataFormat(Class<?> type) {
super(type);
}
@Override
public void marshal(Exchange exchange, Object body, OutputStream outputStream) throws Exception {
final StreamingBindyModelFactory factory = (StreamingBindyModelFactory) super.getFactory();
final int splitIndex = exchange.getProperty(Exchange.SPLIT_INDEX, -1, int.class);
final boolean splitComplete = exchange.getProperty(Exchange.SPLIT_COMPLETE, false, boolean.class);
super.marshal(exchange, body, outputStream);
if (splitIndex == 0) {
factory.setGenerateHeaderColumnNames(false); // turn off header generate after first exchange
} else if(splitComplete) {
factory.setGenerateHeaderColumnNames(true); // turn on header generate when split complete
}
}
@Override
protected BindyAbstractFactory createModelFactory(FormatFactory formatFactory) throws Exception {
BindyCsvFactory bindyCsvFactory = new StreamingBindyModelFactory(getClassType());
bindyCsvFactory.setFormatFactory(formatFactory);
return bindyCsvFactory;
}
public class StreamingBindyModelFactory extends BindyCsvFactory implements BindyFactory {
public StreamingBindyModelFactory(Class<?> type) throws Exception {
super(type);
}
public void setGenerateHeaderColumnNames(boolean generateHeaderColumnNames) throws IllegalAccessException {
FieldUtils.writeField(this, "generateHeaderColumnNames", generateHeaderColumnNames, true);
}
}
}