java - Jersey Rest 服务无法使用 Json 注释工作

Question

我有以下类(class):服务器启动.java

import java.io.IOException;
import com.sun.jersey.api.container.httpserver.HttpServerFactory;
import com.sun.jersey.api.core.PackagesResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.api.json.JSONConfiguration;
import com.sun.net.httpserver.HttpServer;

public class ServerStartUp {
static final String BASE_URI = "http://localhost:9999/";
public static void main(String[] args) {


    try {
        final ResourceConfig rc = new PackagesResourceConfig("com.twins.engine");
        rc.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, true);         
        HttpServer server = HttpServerFactory.create(BASE_URI,rc);
        server.setExecutor(null);
        server.start();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
}

和下面的类SysInfo.Java

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import com.twins.engine.model.SysInfo;

@Path("/Sys")
public class General {

@GET
@Path("/info")
@Produces(MediaType.APPLICATION_JSON)
public SysInfo getInfo(){
    SysInfo info = new SysInfo("Monetoring 365");
    return info;
}
}

以及以下模型类SysInfo.java

public class SysInfo {
private String name;
public SysInfo(String name) {
    this.setName(name);
}

public String getName() {return name;}

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

当我运行 serverStartup 类并导航到以下网址时: http://127.0.0.1:9999/sys/info

我遇到了以下异常:

原因:com.sun.jersey.api.MessageException:Java 类 com.twins.engine.model.SysInfo 和 Java 类型类 com.twins.engine.model.SysInfo 和 MIME 媒体的消息正文编写器未找到类型 text/html ... 15 更多

enter image description here我还附加了以下 jar 作为图像，是否有任何缺少的配置我必须做

Answer 1

尝试以下

final ResourceConfig rc = new PackagesResourceConfig("com.twins.engine");
final Map<String, Object> config = new HashMap<String, Object>();
config.put("com.sun.jersey.api.json.POJOMappingFeature", true);
rc.setPropertiesAndFeatures(config);
HttpServer server = HttpServerFactory.create(BASE_URI,rc);
server.setExecutor(null);
server.start();

也许你必须添加 jackson-mapper

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.12</version>
</dependency>

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-core-asl</artifactId>
    <version>1.9.12</version>
</dependency>