java - 通过属性文件的 Restful url

Question

大家好，我有下面的示例 Restful 服务， Jersey 2

模型类

@XmlRootElement(name = "book")
@XmlType(propOrder = { "id", "name", "author", "price" })
public class Book {

private String id;
private String name;
private String price;
private String author;

public Book() {

}

public Book(String id, String name, String price, String author) {
    super();
    this.id = id;
    this.name = name;
    this.price = price;
    this.author = author;
}

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getPrice() {
    return price;
}

public void setPrice(String price) {
    this.price = price;
}

public String getAuthor() {
    return author;
}

public void setAuthor(String author) {
    this.author = author;
}

}

我的 DAOImpl

public class BooksImpl{
static Connection conn = null;
static Statement stmt;
ResultSet rs;

public List<Book> getAllBooks() throws SQLException, ClassNotFoundException, FileNotFoundException {
    getConnection();
    List<Book> arrBook = new ArrayList<Book>();
    rs = stmt.executeQuery(GET_ALL_BOOKS);
    while (rs.next()) {
        arrBook.add(new Book(rs.getString(1), rs.getString(2), rs.getString(3), rs.getString(4)));
    }
    rs.close();
    stmt.close();
    conn.close();
    return arrBook;
}

服务

@Path("/library")
@Produces({ MediaType.APPLICATION_JSON + ";charset=UTF-8",MediaType.APPLICATION_XML + ";charset=utf-8" })
@Consumes({ MediaType.APPLICATION_JSON + ";charset=UTF-8",MediaType.APPLICATION_XML + ";charset=utf-8" })
public class BookServiceImpl implements BookService {

private BooksImpl booksImpl = new BooksImpl();

@GET
public Response getBooks(@QueryParam("format") String format) throws SQLException, ClassNotFoundException, FileNotFoundException {
    return Response.status(Status.OK).entity(new GenericEntity<List<Book>>(booksImpl.getAllBooks()) {
    }).header(HttpHeaders.CONTENT_TYPE, "XML".equalsIgnoreCase(format)
            ? MediaType.APPLICATION_XML + ";charset=UTF-8" : MediaType.APPLICATION_JSON + ";charset=UTF-8")
            .status(Status.OK).build();

}

所以最后我在 postman 中发出一个获取请求，比如::

http://localhost:8080/BooksJAXRS/library

这很好，我可以通过从 DB 获取所有书籍来得到回复。

我的 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>BooksJAXRS</display-name>
<welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
</welcome-file-list>

<servlet>
    <servlet-name>jersey-servlet</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.library.books</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>jersey-servlet</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

</web-app>

我的要求是对于不同的 http 方法，我们有不同的 url 端点路径，例如

GET :  http://localhost:8080/BooksJAXRS/library
POST :  http://localhost:8080/BooksJAXRS/library
DELETE : http://localhost:8080/BooksJAXRS/library/1
PUT :  http://localhost:8080/BooksJAXRS/library/1

所以我制作了一个 Prop 文件

GET=http://localhost:8080/BooksJAXRS/library
POST=http://localhost:8080/BooksJAXRS/library
DELETE= http://localhost:8080/BooksJAXRS/library/1
PUT= http://localhost:8080/BooksJAXRS/library/1

现在我想捕获该静态 url 并将其传递到 props 文件，并根据方法和 url 相应地路由它

谢谢 标记

Answer 1

您可以在调用相同私有(private)方法的 2 个不同方法上创建 2 个映射，如下所示:

@Path("/")
...
public class BookServiceImpl implements BookService {

    @Path("/")
    @GET
    public Response getBooksByRoot(@QueryParam("format") String format) {
        return getBooks(format);
    }

    @Path("/library")
    @GET 
    public Response getBooksByLibrary(@QueryParam("format") String format) {
        return getBooks(format);
    }

    private Response getBooks(String format) {
        ...
    }

    @Path("/library")
    @POST 
    public Response createBook(@QueryParam("name") String name) {
        ...
    }

响应更新:

您似乎想要动态映射，因此需要使用带有正则表达式的Path。

@Path("/")
...
public class BookServiceImpl implements BookService {

    @Path("/{parameter:.*}")
    @GET
    public Response getBooks(@PathParam("parameter") String parameter) {
        if (properties.getProperty("GET").endsWith(parameter) {
            // code to get the books here
        } else {
            return Response.status(Response.Status.NOT_FOUND).build();
        }
    }

警告:上面的代码片段仅用于展示想法，并不意味着完美。例如，根据您的上下文，使用 endsWith 进行测试可能还不够。