Java Language Tutorial => Using XmlAdapter to trim string.

Example

package com.example.xml.adapters;

import javax.xml.bind.annotation.adapters.XmlAdapter;

public class StringTrimAdapter extends XmlAdapter<String, String> {
    @Override
    public String unmarshal(String v) throws Exception {
        if (v == null)
            return null;
        return v.trim();
    }

    @Override
    public String marshal(String v) throws Exception {
        if (v == null)
            return null;
        return v.trim();
    }
}

And in package-info.java add following declaration.

@XmlJavaTypeAdapter(value = com.example.xml.adapters.StringTrimAdapter.class, type = String.class)
package com.example.xml.jaxb.bindings;// Packge where you intend to apply trimming filter

import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

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Java Language JAXB Using XmlAdapter to trim string.

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