[英]Why my web application works on Glassfish, but doesn't on Tomcat server?
我有以下Maven项目:
的pom.xml
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>
<!-- uncomment this to get JSON support <dependency> <groupId>org.glassfish.jersey.media</groupId> <artifactId>jersey-media-moxy</artifactId> </dependency> -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.26</version>
</dependency>
</dependencies>
<properties>
<param>local</param>
<jersey.version>2.16</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<finalName>todoapi</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources/${param}</directory>
</resource>
</resources>
</build>
web.xml中
<web-app>
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>ca.gatin.todoapi</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webapi/*</url-pattern>
</servlet-mapping>
</web-app>
REST资源
@Path("/accounts")
public class AccountResource {
AccountService accountService = new AccountService();
@GET
@Path("/test")
@Produces(MediaType.TEXT_HTML)
public String wsTest() {
return "Web Service works!";
}
@GET
@Produces(MediaType.APPLICATION_JSON)
public List<Account> getAccounts() {
return accountService.getAccounts();
}
}
和模型
@XmlRootElement
public class Account {
private int id;
private String firstName;
private String lastName;
private String email;
private String password;
private boolean isActive;
private Date dateCreated;
private Date dateLastModified;
// required for JAXB
public Account() {}
...
}
当我在GlassFish 4.0上部署此项目时,所有API都可以工作,但是当我在Tomcat 7上部署时,该API可以工作: http:// localhost:8080 / todoapi / webapi / accounts / test ,但是该项目不起作用: http:/ / localhost:8080 / todoapi / webapi / accounts如果给出不同的错误,无论我尝试什么:
com.sun.jersey.api.MessageException找不到MIME媒体类型application / json。
org.glassfish.jersey.message.internal.WriterInterceptorExecutor $ TerminalWriterInterceptor aroundWriteTo SEVERE:找不到针对媒体类型= application / json的MessageBodyWriter,
好的,所以您的错误说明了一切:
MessageBodyWriter not found for media type=application/json
当使用基于JAXRS的框架时,您需要消息编写器来生成json / xml。 很少有Web /应用程序服务器提供默认的消息编写器,例如在Glassfish的情况下。 但是并非所有服务器都提供此功能,在第二种情况下,Tomcat没有提供。
您需要为消息json消息编写者(例如jersey-json等)添加依赖项。 当您使用Maven时,应该这样做:
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>{latest_version}</version>
</dependency>
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