springMVC入门(三) - vastshine

来自 : vastshine.com/article/detail/. 发布时间：2021-03-25

public class Product implements Serializable { private static final long serialVersionUID = 123456789L; private String name; private String description; private BigDecimal price; public String getName() { return name; public void setName(String name) { this.name = name; public String getDescription() { return description; public void setDescription(String description) { this.description = description; public BigDecimal getPrice() { return price; public void setPrice(BigDecimal price) { this.price = price;

ProductForm.java

package com.model;public class ProductForm { private String name; private String description; private String price; public String getName() { return name; public void setName(String name) { this.name = name; public String getDescription() { return description; public void setDescription(String description) { this.description = description; public String getPrice() { return price; public void setPrice(String price) { this.price = price;

ProductService.java

package com.service;import com.model.Product;public interface ProductService { Product add(Product product); Product get(int id);

ProductServiceImpl.java

package com.service;import java.math.BigDecimal;import java.util.HashMap;import java.util.Map;import java.util.concurrent.atomic.AtomicLong;import org.springframework.stereotype.Service;import com.model.Product;import com.service.ProductService;public class ProductServiceImpl implements ProductService { private Map Long, Product products = new HashMap Long, Product  private AtomicLong generator = new AtomicLong(); public ProductServiceImpl() { Product product = new Product(); product.setName( 产品1  product.setDescription( 产品简介  product.setPrice(new BigDecimal(39.99)); add(product); @Override public Product add(Product product) { long newId = generator.incrementAndGet(); product.setId(newId); products.put(newId, product); return product; @Override public Product get(long id) { return products.get(id);

ProductController.java

package com.mycontroller;import java.math.BigDecimal;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import com.model.Product;import com.model.ProductForm;@Controllerpublic class ProductController { private static final Log logger = LogFactory.getLog(ProductController.class); @RequestMapping(value= /input-product ) public String inputProduct() { logger.info( inputProduct called  return ProductForm  @RequestMapping(value= /save-product ) public String saveProduct(ProductForm productForm, Model model) { logger.info( saveProduct called  // no need to create and instantiate a ProductForm // create Product Product product = new Product(); product.setName(productForm.getName()); product.setDescription(productForm.getDescription()); try { product.setPrice(new BigDecimal(productForm.getPrice())); } catch (NumberFormatException e) { // add product model.addAttribute( product , product); return ProductDetails 

ProductForm.jsp

 %@ page contentType= text/html;charset=UTF-8 language= java %  html  head  title Product Form /title  /head  body  form action= save-product method= post  fieldset  legend Add a product /legend  label for= name Product Name: /label  input type= text id= name name= name  tabindex= 1  label for= description Description: /label  input type= text id= description  name= description tabindex= 2  label for= price Price: /label  input type= text id= price name= price  tabindex= 3  input id= reset type= reset tabindex= 4  input id= submit type= submit tabindex= 5  /fieldset  /form  /body  /html 

ProductDetails.jsp

 %@ page contentType= text/html;charset=UTF-8 language= java %  html  head  title Product Details /title  /head  body  div  h4 The product has been saved. /h4  h5 Details: /h5  Product Name: ${product.name} br/  Description: ${product.description} br/  Price: $${product.price} /div  /body  /html 

浏览器访问http://localhost:8080/input-product

下面使用@Autowired和@Service进行依赖注入
dispatcher-servlet.xml添加一项

 !--service--  context:component-scan base-package= com.service / 

ProductServiceImpl.java加入@Service

@Servicepublic class ProductServiceImpl implements ProductService {

ProductController.java修改如下

package com.mycontroller;import java.math.BigDecimal;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import com.model.Product;import com.model.ProductForm;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.servlet.mvc.support.RedirectAttributes;import org.springframework.web.bind.annotation.PathVariable;import com.service.ProductService;