Jackson XML deserialization error: no String-argument constructor/factory method to deserialize from String value ('checka'),

Question

I am trying to deserialize a simple xml with pojo but getting error as below: Exception in thread "main" com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of classname (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('checka') at [Source: (com.ctc.wstx.sr.ValidatingStreamReader); line: 3, column: 15] (through reference chain: classname["testData"]->java.util.ArrayList[0]) at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63)



    checka
    netwebshopa
    Testa


    check
    netwebshop
    Test

@JacksonXmlRootElement(localName = "tc")
public class TC {

private List testData;

public List getTestData() {
    return testData;
}

public void setTestData(List testData) {
    this.testData = testData;
}



}


public class TestData {
    
    
private String post;
private String xtenantid;
private String jsonbody;

public String getPost() {
    return post;
}
public void setPost(String post) {
    this.post = post;
}
public String getXtenantid() {
    return xtenantid;
}
public void setXtenantid(String xtenantid) {
    this.xtenantid = xtenantid;
}
public String getJsonbody() {
    return jsonbody;
}
public void setJsonbody(String jsonbody) {
    this.jsonbody = jsonbody;
}


    
}

Admin · Answer

You need a constructor with all parameters:

public class TestData(String post, String xtenantid, String jsonbody) {
    
    
this.post= post;
this.xtenantid= xtenantid;
this.jsonbody= jsonbody;

user_5752972 · Answer

If you try to deserialize the class. You get something like this.



    
        checka2
        netwebshopa2
        Testa2
    
    
        checka1
        netwebshopa1
        Testa1

The TestData class is duplicated because jackson uses elementWrapper by default. To remove it, you must use @JacksonXmlElementWrapper(useWrapping = false).

The result should look like this.

public class ParrentXml {

    @JacksonXmlElementWrapper(useWrapping = false)
    List childxmls = new ArrayList<>();

    public List getChildxmls() {
        return childxmls;
    }

    public void setChildxmls(List childxmls) {
        this.childxmls = childxmls;
    }
}

Jackson XML deserialization error: no String-argument constructor/factory method to deserialize from String value ('checka'),

2 Answers