使用tomcat 9.0.38的Eclipse中的HTTP Server 500

如何解决使用tomcat 9.0.38的Eclipse中的HTTP Server 500

这是web.xml文件

    <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
    id="WebApp_ID" version="4.0">
    <display-name>REST_API_Ecommerce_App</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>JaxRsApp</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.oracle.api</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>JaxRsApp</servlet-name>
        <url-pattern>/onlineapi/*</url-pattern>
    </servlet-mapping>
    
</web-app>

购物目录文件在这里

import java.util.List;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import com.oracle.dao.ProductDao;
import com.oracle.model.Product;

@Path("/products")
public class ShoppingCatalogue {
    
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public List<Product> getAllProducts(){
        ProductDao dao=new ProductDao();
        return dao.getAllProducts();
    }
}

Mediatype.APPLICATION_JSON解决了HTTP_500错误，没有任何说明，控制台也没有错误。

productdao类如下

import java.util.ArrayList;

public class ProductDao {
    private ArrayList<Product> productList = new ArrayList<>();
    {
        Product p1 = new Product(101,"i3",30838);
        Product p2 = new Product(102,"i5",130838);
        Product p3 = new Product(103,"i7",230838);
        Product p4 = new Product(104,"i9",330838);
        Product p5 = new Product(105,"i9 10th",430838);
        productList.add(p1);
        productList.add(p2);
        productList.add(p3);
        productList.add(p4);
        productList.add(p5);
    }

    public ArrayList<Product> getAllProducts() {
        return productList;
    }

}

产品类别如下：

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Product {
    private int productId;
    private String productName;
    private float productPrice;
    public int getProductId() {
        return productId;
    }
    public void setProductId(int productId) {
        this.productId = productId;
    }
    public String getProductName() {
        return productName;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    public float getProductPrice() {
        return productPrice;
    }
    public void setProductPrice(float productPrice) {
        this.productPrice = productPrice;
    }
    public Product(int productId,String productName,float productPrice) {
        super();
        this.productId = productId;
        this.productName = productName;
        this.productPrice = productPrice;
    }
}

我无法弄清为什么我继续通过APPLICATION_XML或APPLICATION_JSON而不是TEXT_HTML出现HTTP 500错误。