#千锋逆战# Spring MVC(1)

实现Controller接口方式

1. 配置pom.xml

   • 
     
         4.0.0
     
         com.shj
         SpringMVC_test
         1.0-SNAPSHOT
     
         war
     
         
             
                 
                 
                     org.apache.maven.plugins
                     maven-compiler-plugin
                     3.6.1
                     
                         1.8
                         1.8
                     
                 
     
                 
                 
                     org.apache.tomcat.maven
                     tomcat7-maven-plugin
                     2.2
                     
                         /
                         8080
                     
                 
             
         
     
         
         
             
             
                 org.springframework
                 spring-webmvc
                 4.3.6.RELEASE
             
     
             
             
                 javax.servlet.jsp
                 jsp-api
                 2.2
                 provided
             
             
                 javax.servlet
                 javax.servlet-api
                 3.0.1
                 provided
             
     
            
             
                 jstl
                 jstl
                 1.2
             
         
     
     
     

2. 配置web.xml

   • 
         dispatcherServlet
         org.springframework.web.servlet.DispatcherServlet
         
             contextConfigLocation
             classpath:spring-mvc.xml
         
     
     
     
         dispatcherServlet
         /
     
     

     配置dispatcherServlet前端控制器的servlet,引用class为org.springframework.web.servlet.DispatcherServlet

   • 填写init-param引用spring-mvc.xml的路径

3. 配置spring-mvc.xml

4. 实体类

   • public class Product {
         private String pname;
         private int pid;
         private double price;
     
         public String getPname() {
             return pname;
         }
     
         public void setPname(String pname) {
             this.pname = pname;
         }
     
         public int getPid() {
             return pid;
         }
     
         public void setPid(int pid) {
             this.pid = pid;
         }
     
         public double getPrice() {
             return price;
         }
     
         public void setPrice(double price) {
             this.price = price;
         }
     
         @Override
         public String toString() {
             final StringBuilder sb = new StringBuilder("Product{");
             sb.append("pname='").append(pname).append('\'');
             sb.append(", pid=").append(pid);
             sb.append(", price=").append(price);
             sb.append('}');
             return sb.toString();
         }
     }
     

5. 实现ProductController实现Controller接口

   • public class ProductController implements Controller {
         @Override
         public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
             //返回一个虚拟页面
             return new ModelAndView("index");
         }
     }
     

6. 实现index.jsp

   • 
         
     this is product input page
        <%--将结果上传至DetailProductController--%>
         
     
             pid: 
     
             pname: 
     
             price: 
     
             
         
     
     

7. 实现DetailProductController实现Controller接口

   • public class DetailProductController implements Controller {
         @Override
         public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
             int pid = Integer.parseInt(request.getParameter("pid"));
             String pname = request.getParameter("pname");
             double price = Double.parseDouble(request.getParameter("price"));
     
             Product product = new Product();
             product.setPid(pid);
             product.setPname(pname);
             product.setPrice(price);
            /*
             * detail:虚拟页面
             * 通过request域将值传递到页面
             * p:p为request域的name
             * product:request域的value
             * */
             return new ModelAndView("detail","p",product);
         }
     }
     

8. detail.jsp页面

   • 
         
     this is detail input page
         <%--直接通过el表达式拿值--%>
         ${p}
     
     

通过注解的方式

1. 配置web.xml,与上一种方式一样

   • 
         
             dispatcherServlet
             org.springframework.web.servlet.DispatcherServlet
             
                 contextConfigLocation
                 classpath:spring-mvc.xml
             
         
     
         
             dispatcherServlet
             /
         
     
     
     

2. 配置spring-mvc.xml

3. ProductController类

   • /*标识为Controller,内部实现Component注解,可以被扫描到*/
     @Controller
     public class ProductController{
         @RequestMapping("/up")
         public String UpProduct() {
             return "index";
         }
     }
     

4. DetailProductController类

   • @Controller
     public class DetailProductController{
     
         @RequestMapping("/show")
         public String show(HttpServletRequest request, Model model) {
             int pid = Integer.parseInt(request.getParameter("pid"));
             String pname = request.getParameter("pname");
             double price = Double.parseDouble(request.getParameter("price"));
     
             Product product = new Product();
             product.setPid(pid);
             product.setPname(pname);
             product.setPrice(price);
     
             model.addAttribute("p", product);
     
             return "detail";
         }
     }