我在追查背后的问题时遇到了麻烦SEVERE: A message body writer for Java class java.lang.Boolean, and Java type class java.lang.Boolean, and MIME media type application/json was not found。
这是我尝试过的：
- 使用
jersey-bundle而不是这些单独的包 - POJOMappingFeature 已启用
- 将 Jackson 添加为依赖项
我不清楚我还需要做什么。这在本地运行良好，所以我不清楚为什么一两个依赖项没有与应用程序的其余部分一起打包。
pom.xml
<jersey-version>1.17.1</jersey-version>
...
<!-- Jersey -->
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey-version}</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>${jersey-version}</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>${jersey-version}</version>
</dependency>
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-spring</artifactId>
<version>${jersey-version}</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
</exclusion>
</exclusions>
</dependency>
Jersey Servlet
//add jersey servlet support
ServletRegistration jerseyServletRegistration = ctx.addServlet("JerseyServlet", new SpringServlet());
jerseyServletRegistration.setInitParameter("com.sun.jersey.config.property.packages", "com.company.product.resource");
jerseyServletRegistration.setInitParameter("com.sun.jersey.spi.container.ContainerResponseFilters", "com.company.product.resource.ResponseCorsFilter");
jerseyServletRegistration.setInitParameter("com.sun.jersey.api.json.POJOMappingFeature", Boolean.TRUE.toString());
jerseyServletRegistration.setInitParameter("com.sun.jersey.config.feature.DisableWADL", Boolean.TRUE.toString());
jerseyServletRegistration.setInitParameter("org.codehaus.jackson.map.DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY", Boolean.TRUE.toString());
jerseyServletRegistration.setLoadOnStartup(1);
我的构建过程
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals><goal>shade</goal></goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.company.product.Main</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
例外：
SEVERE: A message body writer for Java class java.lang.Boolean, and Java type class java.lang.Boolean, and MIME media type application/json was not found
SEVERE: The registered message body writers compatible with the MIME media type are:
*/* ->
com.sun.jersey.server.impl.template.ViewableMessageBodyWriter
产生错误的代码：
@Path("/system")
public class SystemResource extends BaseResource {
@GET
@Path("/isOnline")
public Boolean isOnline () {
return Boolean.TRUE;
}
}
@Consumes({MediaType.APPLICATION_JSON})
@Produces({MediaType.APPLICATION_JSON})
public class BaseResource {
}
我已经通过包日志验证了 jersey-json 包含在我的 jar 中。对我来说不确定的一个领域是哪个包/类实际上为布尔值提供了消息正文编写器？
添加了赏金，因为这阻止了我在我们的生产环境中运行，我们真的需要解决这个问题。