грешка на анализатора на digester java.lang.NoSuchMethodException: Employee.‹init›()

Опитвам се да анализирам xml с помощта на digester.

Моят XML

<root>
<Employee>
    <Id>1</Id>
    <FirstName>Charles</FirstName>
    <LastName>Madigen</LastName>
    <Location>Louisiana</Location>
    <Skill>Accountant</Skill>
</Employee>
</root>

Моят клас за служители

public class Employee { 
    private int empId;
    private String fName;
    private String lName;
    private String location;
    private String skill;   
    public Employee(int empId, String fName, String lName, String location,
            String skill) {
        this.empId = empId;
        this.fName = fName;
        this.lName = lName;
        this.location = location;
        this.skill = skill;
    }
    @Override
    public String toString() {
        return "Employee [empId=" + empId + ", fName=" + fName + ", lName="
                + lName + ", location=" + location + ", skill=" + skill + "]";
    }

    public void setEmpId(int empId) {
        this.empId = empId;
    }

    public void setfName(String fName) {
        this.fName = fName;
    }

    public void setlName(String lName) {
        this.lName = lName;
    }

    public void setLocation(String location) {
        this.location = location;
    }
    public void setSkill(String skill) {
        this.skill = skill;
    }

}

и моят читателски клас

public class CSVtoXMLTransformer {

    public static void main(String[] args) throws IOException  {        
        CSVtoXMLTransformer cx=new CSVtoXMLTransformer();
        //cx.transfromer();
        cx.validator();
    }                               

    void validator() throws IOException{                        
        String itemTag = "root/Employee";
        Digester digester = new Digester();
        digester.setValidating(false);
        digester.addObjectCreate(itemTag, "assignment3.Employee");
        digester.addCallMethod(itemTag + "/Id", "setEmpId", 0);
        digester.addCallMethod(itemTag + "/FirstName", "setfName", 0);
        digester.addCallMethod(itemTag + "/LastName", "setlName", 0);
        digester.addCallMethod(itemTag + "/Location", "setLocation", 0);
        digester.addCallMethod(itemTag + "/Skill", "setSkill", 0);   

          File inputFile = new File( "generatedEmployee.xml" );
          Employee emp;
        try {
            emp = (Employee)digester.parse( inputFile );
             System.out.println(emp);
        } catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }                               
    }        
}

Но докато бягам, получавам тази грешка, може ли някой да ми помогне по въпроса

org.xml.sax.SAXParseException; systemId: file:/D:/workspace/poc2/generatedEmployee.xml; lineNumber: 2; columnNumber: 11; Error at line 2 char 11: assignment3.Employee
    at org.apache.commons.digester.Digester.createSAXException(Digester.java:3363).......
Caused by: java.lang.NoSuchMethodException: assignment3.Employee.<init>()
    at java.lang.Class.getConstructor0(Unknown Source)
    ... 17 more.....

java xml xml-parsing sax
person user3123372    schedule 11.01.2016    source източник

Отговори (2)


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Caused by: java.lang.NoSuchMethodException: assignment3.Employee.<init>()
    at java.lang.Class.getConstructor0(Unknown Source)

Метод със сигнатура assignment3.Employee.<init>() не е намерен във вашия компилиран код, затова JVM повдигна java.lang.NoSuchMethodException изключение.

Във вашия клас сте създали параметризиран конструктор, когато създавате параметризиран конструктор, компилаторът няма да създаде конструктор по подразбиране, така че трябва да приложите и конструктор по подразбиране.

person atish shimpi    schedule 11.01.2016

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Имате нужда от конструктор по подразбиране във вашия клас служители:

public class Employee { 
    private int empId;
    private String fName;
    private String lName;
    private String location;
    private String skill;   

    public Employee(){}; //Default constructor

    public Employee(int empId, String fName, String lName, String location,
            String skill) {
        this.empId = empId;
        this.fName = fName;
        this.lName = lName;
        this.location = location;
        this.skill = skill;
    }
    @Override
    public String toString() {
        return "Employee [empId=" + empId + ", fName=" + fName + ", lName="
                + lName + ", location=" + location + ", skill=" + skill + "]";
    }
...
}
person Jens    schedule 11.01.2016