JAXB / Http Client unmarshaller example(샘플)

general java

JAXB / Http Client unmarshaller example(샘플)

'김용환' 2012. 2. 14. 19:18

apache commons의 http client와 jaxb로 어떻게 테스트할지에 대해서 작성한 글이다.

특정 URL을 호출하면 사원 정보가 나온다고 가정한다.

<ROOT>

….

</EMPLOYEE>

….

</EMPLOYEE>

</ROOT>

객체는 Root-List<Employee>의 구조로 생각,

# Root.java 소스

package test;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "ROOT")
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {

    @XmlElement(name="EMPLOYEE")
    private List<Employee> employees;

    public Root() {
        employees = new ArrayList<Employee>();
    }

    public List<Employee> getEmployees() {
        return employees;
    }

    public void setEmployees(List<Employee> employees) {
        this.employees = employees;
    }

}

# Employee.java

package test;

public class Employee {

private String id;
private String nm;

….

… // set, get

}

찾고 싶은 사람의 사번을 작성한다.

# XEmployee.java

public class XEmployee {

    private static List<String> employeeList;

    public static List<String> getEmployeeList() {
        return employeeList;
    }

    static {
        employeeList = new ArrayList<String>();

        employeeList.add("aaa");
         employeeList.add("bbb");
         employeeList.add("ccc");

…

}
}

찾고 싶은 사람을 찾아서 출력한다.

# main 메서드

package test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

public class CheckEmp {
    public static final boolean isSaved = false;
    public static final String URL = "http://xxxxxxxx";
    public static JAXBContext jaxbContext;
    static {
        try {
            jaxbContext = JAXBContext
                    .newInstance(new Class[] { test.Root.class });
        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }

public static void main(String[] args) throws Exception {

// connect url
BufferedReader reader = connectURL();

        // save file
        if (isSaved) {
            saveFile(reader);
        }

// get object
Root root = getRoot(reader);

        // find
        for (String retiredEmpID : XEmployee.getEmployeeList()) {
            boolean found = false;
            for(Employee emp : root.getEmployees()) {
                if (emp.getID().trim().equalsIgnoreCase(retiredEmpID)) {
                    found = true;
                }
            }
            if (found == false) {
                System.out.println(retiredEmpID);
            }
        }
    }

    private static Root getRoot(BufferedReader reader) throws JAXBException {
        Root root = (Root) jaxbContext.createUnmarshaller().unmarshal(reader);
        return root;
    }

    private static BufferedReader connectURL() throws IOException,
            ClientProtocolException, UnsupportedEncodingException {

        HttpGet httpget = new HttpGet(URL);
        HttpClient httpclient = new DefaultHttpClient();
        httpclient.getParams().setParameter("http.socket.timeout", 999000);

        HttpResponse response = httpclient.execute(httpget);
        HttpEntity entity = response.getEntity();
        if (entity == null) {
            throw new RuntimeException("url error");
        }
        InputStream instream = entity.getContent();
        BufferedReader reader = new BufferedReader(new InputStreamReader(instream, "utf-8"));
        return reader;
    }

    private static void saveFile(BufferedReader reader) throws IOException {
        Writer fstream = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("aaa.txt"), "utf-8"));
        BufferedWriter out = new BufferedWriter(fstream);
        char[] a = new char[1024] ;
        while (reader.read(a) > 0) {
            out.write(a);
        }
        out.flush();
        System.out.println("File created successfully.");
    }

}

# pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test1123</groupId>
<artifactId>teswt1</artifactId>
<version>0.0.1-SNAPSHOT</version>

<dependencies>
  <dependency>
   <groupId>org.apache.httpcomponents</groupId>
   <artifactId>httpclient</artifactId>
   <version>4.1.2</version>
  </dependency>
  <dependency>
   <groupId>javax.xml.bind</groupId>
   <artifactId>jaxb-api</artifactId>
   <version>2.2</version>
  </dependency>
  <dependency>
   <groupId>com.sun.xml.bind</groupId>
   <artifactId>jaxb-xjc</artifactId>
   <version>2.2</version>
  </dependency>
  <dependency>
   <groupId>com.sun.xml.bind</groupId>
   <artifactId>jaxb-impl</artifactId>
   <version>2.2</version>
  </dependency>
</dependencies>

</project>