es 获取内部版本号，jest 局部更新代码修改

http://192.168.1.1:9200/zzm/zzm/_search
{"version":"true"}

package io.searchbox.core;

import io.searchbox.action.BulkableAction;
import io.searchbox.action.SingleResultAbstractDocumentTargetedAction;
import io.searchbox.core.DocumentResult;

import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;

import com.google.gson.Gson;

/**
* @author Dogukan Sonmez
* @author cihat keser
*/
public class Update extends SingleResultAbstractDocumentTargetedAction implements BulkableAction<DocumentResult> {

protected Update(Builder builder) {
super(builder);

this.payload = builder.payload;
setURI(buildURI());
}

@Override
public String getBulkMethodName() {
return "update";
}

@Override
protected String buildURI() {
return super.buildURI() + "/_update";
}

@Override
public String getData(Gson gson) {
String str = super.getData(gson);
if(getId()!=null){
str = "{\"doc\":"+str+"}";
}
return str;
}

@Override
public String getRestMethodName() {
return "POST";
}

@Override
public String getPathToResult() {
return "ok";
}

@Override
public int hashCode() {
return new HashCodeBuilder()
.appendSuper(super.hashCode())
.toHashCode();
}

@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (obj == this) {
return true;
}
if (obj.getClass() != getClass()) {
return false;
}

return new EqualsBuilder()
.appendSuper(super.equals(obj))
.isEquals();
}

public static class Builder extends SingleResultAbstractDocumentTargetedAction.Builder<Update, Builder> {
private final Object payload;

public Builder(Object payload) {
this.payload = payload;
}

public Update build() {
return new Update(this);
}
}

}