Java 使用SpringMVC从存储库检索XML元数据
大家好,我尝试了七天从网络上的存储库中检索数据。特别是我尝试从这里检索作者列表(其中包含URL:http://www.../base/author): 以及:Java 使用SpringMVC从存储库检索XML元数据,java,spring-mvc,Java,Spring Mvc,大家好,我尝试了七天从网络上的存储库中检索数据。特别是我尝试从这里检索作者列表(其中包含URL:http://www.../base/author): 以及: import java.util.List; 导入javax.xml.bind.annotation.XmlRootElement; @XmlRootElement(name=“authors”) 公共类作者列表{ 私人名单 我应该从仓库、姓名电子邮件等处收到数据 但我收到的是: 请求的资源()不可用。 我不明白是什么问题,URL的 接收
import java.util.List;
导入javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name=“authors”)
公共类作者列表{
私人名单
我应该从仓库、姓名电子邮件等处收到数据
但我收到的是:
请求的资源()不可用。
我不明白是什么问题,URL的
接收到的数据?
有什么主张吗?关于第一个问题,JAXB注释看起来不正确,authors xml元素没有映射到AuthorList类,author中的内部元素author没有映射到author类,并且没有考虑名称空间
我认为JAXB注释的一些快速修复方法可能是:
您可以定义几个类:
AtomLink:
@XmlAccessorType(XmlAccessType.FIELD)
AuthorMeta,用于表示authors中的author标记:
@XmlAccessorType(XmlAccessType.FIELD)
public class AuthorMeta {
@XmlElement(name="link", namespace="http://www.w3.org/2005/atom")
private Atomlink link;
public Atomlink getLink() {
return link;
}
public void setLink(Atomlink link) {
this.link = link;
}
}
最后是您已经拥有的AuthorList,但具有名称空间:
@XmlRootElement(name = "authors", namespace="http:www.../base")
@XmlAccessorType(XmlAccessType.FIELD)
public class AuthorList {
private List<AuthorMeta> author;
public List<AuthorMeta> getAuthor() {
return author;
}
public void setAuthor(List<AuthorMeta> data) {
this.author = data;
}
}
现在,关于第二个问题,resource not found.。映射看起来不错,最好将日志级别设置为trace并查看发生了什么
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="author")
public class Author {
private Long id;
private String name;
private String address;
private String affiliation;
private String email;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setFirstName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getAffiliation() {
return affiliation;
}
public void setAffiliation(String affiliation) {
this.affiliation = affiliation;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
import java.util.List;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="authors")
public class AuthorList {
private List<Author> data;
public List<Author> getData() {
return data;
}
public void setData(List<Author> data) {
this.data = data;
}
public class Controller {
protected static Logger logger = Logger.getLogger("controller");
private RestTemplate restTemplate = new RestTemplate();
/**
* Retrieves all records from the REST provider
* and displays the records in a JSP page
*/
@RequestMapping(value = "/authors", method = RequestMethod.GET)//getall
public String getAll(Model model) {
// Prepare acceptable media type
List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
acceptableMediaTypes.add(MediaType.APPLICATION_XML);
// Prepare header
HttpHeaders headers = new HttpHeaders();
headers.setAccept(acceptableMediaTypes);
HttpEntity<Author> entity = new HttpEntity<Author>(headers);
// Send the request as GET
try {
ResponseEntity<AuthorList> result = restTemplate.exchange("href="http://www.../base/author/",
HttpMethod.GET, entity, AuthorList.class);
// Add to model
model.addAttribute("authors", result.getBody().getData());
} catch (Exception e) {
}
// This will resolve to /WEB-INF/jsp/personspage.jsp
return "personspage";
}
/**
* Retrieves a single record from the REST provider
* and displays the result in a JSP page
*/
@RequestMapping(value = "/author", method = RequestMethod.GET)
public String getPerson(@RequestParam("id") Long id, Model model) {
// Prepare acceptable media type
List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
acceptableMediaTypes.add(MediaType.APPLICATION_XML);
// Prepare header
HttpHeaders headers = new HttpHeaders();
headers.setAccept(acceptableMediaTypes);
HttpEntity<Author> entity = new HttpEntity<Author>(headers);
// Send the request as GET
try {
ResponseEntity<Author> result = restTemplate.exchange("href="http://www.../base/author/{id}",
HttpMethod.GET, entity, Author.class, id);
// Add to model
model.addAttribute("author", result.getBody());
} catch (Exception e) {
}
// This will resolve to /WEB-INF/jsp/getpage.jsp
return "getpage";
}
}
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>Get Author</h1>
<c:if test="${empty author}">
No records found!
</c:if>
<c:if test="${!empty author}">
<table style="border: 1px solid #333">
<tr>
<td style="width: 100px">Id</td>
<td>${author.id}</td>
</tr>
<tr>
<td>Name</td>
<td>${author.name}</td>
</tr>
<tr>
<td>Address</td>
<td>${author.address}</td>
</tr>
<tr>
<td>Affiliation</td>
<td>${author.affiliation}</td>
</tr>
<tr>
<td>Email</td>
<td>${author.email}</td>
</tr>
</table>
</c:if>
public class Atomlink {
@XmlAttribute
private String rel;
@XmlAttribute
private String type;
@XmlAttribute
private String href;
.......
@XmlAccessorType(XmlAccessType.FIELD)
public class AuthorMeta {
@XmlElement(name="link", namespace="http://www.w3.org/2005/atom")
private Atomlink link;
public Atomlink getLink() {
return link;
}
public void setLink(Atomlink link) {
this.link = link;
}
}
@XmlRootElement(name = "authors", namespace="http:www.../base")
@XmlAccessorType(XmlAccessType.FIELD)
public class AuthorList {
private List<AuthorMeta> author;
public List<AuthorMeta> getAuthor() {
return author;
}
public void setAuthor(List<AuthorMeta> data) {
this.author = data;
}
}
@XmlRootElement(name = "author", namespace="http://http:www.../base")
@XmlAccessorType(XmlAccessType.FIELD)
public class Author {
private String name;
private String address;
private String affiliation;
private String email;