春季在Jersey应用程序的自定义消息正文编写器

Question

I have a Rest Api that uses Spring MVC and Jersey

@GET
@Path("/hello")
@Produces(MediaType.APPLICATION_JSON)
public List<AccountEntity> hello() {
    return repository.findAll();

}

This Method is failing with the following error always

SEVERE: A message body writer for Java class java.util.ArrayList, and Java type java.util.List<net.viralpatel.spring.controller.AccountEntity>, and MIME media type application/json was not found.

My Gradle Dependencies

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
    compile group: 'org.springframework', name: 'spring-webmvc', version: '4.3.9.RELEASE'
    compile group: 'org.springframework', name: 'spring-tx', version: '4.3.9.RELEASE'
    compile group: 'org.springframework.data', name: 'spring-data-jpa', version: '1.11.4.RELEASE'
    compile group: 'org.hibernate', name: 'hibernate-entitymanager', version: '5.2.10.Final'
    compile "javax.servlet:javax.servlet-api:3.0.1"
    compile "javax.servlet:jstl:1.2"
    compile 'org.glassfish.grizzly:grizzly-http-servlet-server:2.3.11@jar'
    compile group: 'mysql', name: 'mysql-connector-java', version: '6.0.6'
    compile group: 'com.sun.jersey.contribs', name: 'jersey-spring', version: '1.19.4'

}

I tried adding

compile group: 'org.glassfish.jersey.media', name: 'jersey-media-moxy', version: '2.26-b06'

But then the error appeared as javax.ws.rs.core.UriBuilder.uri(Ljava/lang/String;)Ljavax/ws/rs/core/UriBuilder;

Update After adding jackson dependency

caused by: com.sun.jersey.api.MessageException: A message body writer for Java class java.util.ArrayList, and Java type java.util.List<net.viralpatel.spring.controller.AccountEntity>, and MIME media type application/json was not found.

Answer 1

You have to add jersey-json dependency instead of moxy or jackson :

compile group: 'com.sun.jersey', name: 'jersey-json', version: '1.19.4'

This dependency already contains jackson in it with other required dependencies.