我开发了用 rest 开发的服务器端 web 服务。我的代码在使用 POSTMAN 应用程序检查时工作正常。但我想获得 JSP 页面中所有 CRUD 操作的响应。每个响应都应该显示在 JSP 页面中，并且消费的数据应该是 JSP 页面。您能否提供如何开发 REST 客户端的方法。我是 Rest Client 的新手。
产品.java
public class Product {
private long pid;
private String pname;
private String category;
private float price;
private long stock;
private String remarks;
public Product()
{
}
public Product(long pid,String pname,String category,float price,long stock,String remarks){
this.pid=pid;
this.pname=pname;
this.category=category;
this.price=price;
this.stock=stock;
this.remarks=remarks;
}
public long getPid() {
return pid;
}
public void setPid(long pid) {
this.pid = pid;
}
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
public long getStock() {
return stock;
}
public void setStock(long stock) {
this.stock = stock;
}
public String getRemarks() {
return remarks;
}
public void setRemarks(String remarks) {
this.remarks = remarks;
}
}
数据库类.java
public class DatabaseClass {
private static Map<Long, Product> products=new HashMap<>();
public static Map<Long, Product> getProduct()
{
return products;
}
}
ProductDaoImpl.java
public class ProductDaoImpl implements ProductDao {
private Map<Long, Product> products=DatabaseClass.getProduct();
public ProductDaoImpl()
{
products.put(1L, new Product(1L,"TV","Entertinement",10000F,250L,"This is best TV!"));
products.put(2L, new Product(2L,"Computer","Technology",20000F,350L,"My Computer name Hp and SONY ViVo!"));
products.put(3L, new Product(3L,"DeskTopComputer","Technology",15000F,150L,"My Desktop Computer name Accer and SONY ViVo!"));
}
//Get All products
public List<Product> getAllProducts() {
return new ArrayList<Product>(products.values());
}
//Get product by product id
public Product getProduct(long pid) {
return products.get(pid);
}
//To Add the products
public Product addProduct(Product product) {
product.setPid(products.size()+1);
products.put(product.getPid(), product);
return product;
}
//Update the product
public Product updateProduct(Product product) {
if(product.getPid()<=0)
{
return null;
}
products.put(product.getPid(), product);
return product;
}
// Delete the product
public Product deleteProduct(long pid) {
return products.remove(pid);
}
//Get the product by category
public List<Product> getProductByCategory(String category) {
List<Product> list = new ArrayList<Product>();
if (products.size()<=0) {
return null;
}
else{
for(Product p: this.products.values()){
if(p.getCategory().equals(category))
list.add(p);
}
return list;
}
}
//Get the product by price
public List<Product> getProductsBasedOnPrice(float startPrice, float endPrice) {
List<Product> list = new ArrayList<Product>();
if (products.size()<=0) {
return null;
}
else{
for(Product p: this.products.values()){
if(startPrice<=p.getPrice() && endPrice>=p.getPrice())
{
list.add(p);
}
}
return list;
}
}}
ProductServiceImpl.java
@Path("/products")
公共类 ProductServiceImpl 实现 ProductService {
ProductDaoImpl productService=new ProductDaoImpl();
@GET
@Produces(MediaType.APPLICATION_XML)
public List<Product> getProducts() {
return productService.getAllProducts();
}
@GET
@Path("/{pid}")
@Produces(MediaType.APPLICATION_XML)
public Product getProduct(@PathParam("pid") long pid)
{
return productService.getProduct(pid);
}
@POST
@Produces(MediaType.APPLICATION_XML)
@Consumes(MediaType.APPLICATION_XML)
public Product addMessage(Product product)
{
return productService.addProduct(product);
}
@PUT
@Path("/{pid}")
@Produces(MediaType.APPLICATION_XML)
@Consumes(MediaType.APPLICATION_XML)
public Product updateProduct(@PathParam("pid") long pid,Product product)
{
product.setPid(pid);
return productService.updateProduct(product);
}
@DELETE
@Path("/{pid}")
@Produces(MediaType.APPLICATION_XML)
public void deleteMessage(@PathParam("pid") long pid)
{
productService.deleteProduct(pid);
}
@GET
@Path("category/{category}")
@Produces(MediaType.APPLICATION_JSON)
public List<Product> getProductsBasedOnCategory(@PathParam("category") String category) {
return productService.getProductByCategory(category);
}
@GET
@Path("basedOnPrice")
@Produces(MediaType.APPLICATION_JSON)
public List<Product> getProductsBasedOnPrice(@QueryParam("startPrice") float startPrice, @QueryParam("endPrice") float endPrice) {
if(startPrice>0 && endPrice>0)
{
return productService.getProductsBasedOnPrice(startPrice, endPrice);
}
return productService.getAllProducts();
}
}