SPRING IN ACTION 第4版笔记-第五章BUILDING SPRING WEB APPLICATIONS-005-以path parameters的形式给action传参数(value=“{}”、@PathVariable)

一

1.以path parameters的形式给action传参数

 @Test

   public void testSpittle() throws Exception {

     Spittle expectedSpittle = new Spittle("Hello", new Date());

     SpittleRepository mockRepository = mock(SpittleRepository.class);

     when(mockRepository.findOne(12345)).thenReturn(expectedSpittle);

     SpittleController controller = new SpittleController(mockRepository);

     MockMvc mockMvc = standaloneSetup(controller).build();

     mockMvc.perform(get("/spittles/12345"))

       .andExpect(view().name("spittle"))

       .andExpect(model().attributeExists("spittle"))

       .andExpect(model().attribute("spittle", expectedSpittle));

   }

在浏览器中访问：http://localhost:8080/SpringInAction4_Chapter5_SpringMVC01/spittles/1

2.controller

package spittr.web;

import java.util.Date;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import spittr.Spittle;

import spittr.data.SpittleRepository;

@Controller

@RequestMapping("/spittles")

public class SpittleController {

  private static final String MAX_LONG_AS_STRING = "9223372036854775807";

  private SpittleRepository spittleRepository;

  @Autowired

  public SpittleController(SpittleRepository spittleRepository) {

    this.spittleRepository = spittleRepository;

  }

  @RequestMapping(value="/{spittleId}", method=RequestMethod.GET)

  public String spittle(

      @PathVariable("spittleId") long spittleId,

      Model model) {

      //The model key will be  spittle

    model.addAttribute(spittleRepository.findOne(spittleId));

    return "spittle";

  }

}

在保证spittleId名称一致的情况下，可以简写

   @RequestMapping(value="/{spittleId}", method=RequestMethod.GET)

   public String spittle(

       @PathVariable long spittleId,

       Model model) {

       //The model key will be  spittle

     model.addAttribute(spittleRepository.findOne(spittleId));

     return "spittle";

   }

3.view

 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

 <html>

   <head>

     <title>Spitter</title>

     <link rel="stylesheet"

           type="text/css"

           href="<c:url value="/resources/style.css" />" >

   </head>

   <body>

     <div class="spittleView">

       <div class="spittleMessage"><c:out value="${spittle.message}" /></div>

       <div>

         <span class="spittleTime"><c:out value="${spittle.time}" /></span>

       </div>

     </div>

   </body>

 </html>