Java JAXB错误:解组时出现意外元素
有人能帮我理解为什么我会出现这个错误吗: javax.xml.bind.UnmarshaleException:意外元素(uri:,local:“items”)。预期的要素是 我刚接触JAX-B,但整天都在这上面,我真的不知道发生了什么,非常感谢您的帮助,非常感谢 项目类别: @XmlRootElementJava JAXB错误:解组时出现意外元素,java,jaxb,jersey,jax-rs,Java,Jaxb,Jersey,Jax Rs,有人能帮我理解为什么我会出现这个错误吗: javax.xml.bind.UnmarshaleException:意外元素(uri:,local:“items”)。预期的要素是 我刚接触JAX-B,但整天都在这上面,我真的不知道发生了什么,非常感谢您的帮助,非常感谢 项目类别: @XmlRootElement public class Item { private String itemID; private String itemDescription; //need to have a c
public class Item {
private String itemID;
private String itemDescription;
//need to have a constructor with no params
public Item(){
}
//Constructor: sets object vars
public Item(String itemID, String itemDescription) {
this.itemID = itemID;
this.itemDescription = itemDescription;
}
@XmlAttribute
//getters and setters
public String getID() {
return itemID;
}
public void setId(String id) {
itemID= id;
}
@XmlElement
public String getDescription() {
return itemDescription;
}
public void setDescription(String description) {
itemDescription = description;
}
解组代码:
resource = client.resource("http://localhost:8080/testProject/rest/items");
ClientResponse response= resource.get(ClientResponse.class);
String entity = response.getEntity(String.class);
System.out.println(entity);
JAXBContext context = JAXBContext.newInstance(Item.class);
Unmarshaller um = context.createUnmarshaller();
Item item = (Item) um.unmarshal(new StringReader(entity));
And this is the XML i'm trying to parse:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<items>
<item id="1">
<description>Chinos</description>
</item>
<item id="2">
<description>Trousers</description>
</item>
</items>
resource=client.resource(“http://localhost:8080/testProject/rest/items");
ClientResponse-response=resource.get(ClientResponse.class);
String entity=response.getEntity(String.class);
系统输出打印项次(实体);
JAXBContext context=JAXBContext.newInstance(Item.class);
Unmarshaller um=context.createUnmarshaller();
Item Item=(Item)um.unmarshal(新StringReader(实体));
这就是我试图解析的XML:
斜纹棉布裤
裤子
以下是创建XML的Web服务:
@GET
@Produces(MediaType.TEXT_XML)
public List<Item> getItemsBrowser(){
java.sql.Connection connection;
java.sql.Statement statement;
List<Item> items = new ArrayList<Item>();
ResultSet resultSet = null;
try {
connection = dataSource.getConnection();
statement = connection.createStatement();
String query = "SELECT * FROM ITEMS";
resultSet = statement.executeQuery(query);
// Fetch each row from the result set
while (resultSet.next()) {
String a = resultSet.getString("itemID");
String b = resultSet.getString("itemDescription");
//Assuming you have a user object
Item item = new Item(a, b);
items.add(item);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return items;
}
@GET
@生成(MediaType.TEXT\u XML)
公共列表getItemsBrowser(){
java.sql.Connection;
java.sql.Statement语句;
列表项=新建ArrayList();
ResultSet ResultSet=null;
试一试{
connection=dataSource.getConnection();
statement=connection.createStatement();
String query=“从项目中选择*”;
resultSet=语句.executeQuery(查询);
//从结果集中获取每一行
while(resultSet.next()){
字符串a=resultSet.getString(“itemID”);
字符串b=resultSet.getString(“itemDescription”);
//假设您有一个用户对象
项目=新项目(a、b);
项目。添加(项目);
}
}捕获(SQLE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
退货项目;
}
创建JAXBContext的类是Item.class,但XML包含一个名为items的列表,而items又包含不同的项条目。您需要另一个类来包装
List<Item>
和单元测试:
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import org.junit.Test;
public class JAXBTest {
@Test
public void xmlIsUnmarshalled() throws JAXBException {
JAXBContext context = JAXBContext.newInstance(Items.class);
Unmarshaller um = context.createUnmarshaller();
Items items = (Items) um.unmarshal(new File("items.xml"));
assertNotNull(items);
assertNotNull(items.getItems());
assertEquals(2, items.getItems().size());
assertEquals("Chinos", items.getItems().get(0).getDescription());
assertEquals("Trousers", items.getItems().get(1).getDescription());
assertEquals("1", items.getItems().get(0).getId());
assertEquals("2", items.getItems().get(1).getId());
}
}
由于您使用的是Jersey cleint API,因此可以执行以下操作并避免创建
项
类:
import java.util.List;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.GenericType;
import com.sun.jersey.api.client.WebResource;
public class JerseyClient {
public static void main(String[] args) {
Client client = Client.create();
WebResource resource = client.resource(""http://localhost:8080/testProject/rest/items"");
List<Item> items = resource.accept("application/xml").get(new GenericType<List<Item>>(){});
System.out.println(items.size());
}
}
import java.util.List;
导入com.sun.jersey.api.client.client;
导入com.sun.jersey.api.client.GenericType;
导入com.sun.jersey.api.client.WebResource;
公共类运动衫客户{
公共静态void main(字符串[]args){
Client=Client.create();
WebResource=client.resource(“”)http://localhost:8080/testProject/rest/items"");
List items=resource.accept(“application/xml”).get(new-GenericType(){});
System.out.println(items.size());
}
}
了解更多信息
项
类:
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import org.junit.Test;
public class JAXBTest {
@Test
public void xmlIsUnmarshalled() throws JAXBException {
JAXBContext context = JAXBContext.newInstance(Items.class);
Unmarshaller um = context.createUnmarshaller();
Items items = (Items) um.unmarshal(new File("items.xml"));
assertNotNull(items);
assertNotNull(items.getItems());
assertEquals(2, items.getItems().size());
assertEquals("Chinos", items.getItems().get(0).getDescription());
assertEquals("Trousers", items.getItems().get(1).getDescription());
assertEquals("1", items.getItems().get(0).getId());
assertEquals("2", items.getItems().get(1).getId());
}
}
import java.util.List;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.GenericType;
import com.sun.jersey.api.client.WebResource;
public class JerseyClient {
public static void main(String[] args) {
Client client = Client.create();
WebResource resource = client.resource(""http://localhost:8080/testProject/rest/items"");
List<Item> items = resource.accept("application/xml").get(new GenericType<List<Item>>(){});
System.out.println(items.size());
}
}