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

 1 @Test
 2   public void testSpittle() throws Exception {
 3     Spittle expectedSpittle = new Spittle("Hello", new Date());
 4     SpittleRepository mockRepository = mock(SpittleRepository.class);
 5     when(mockRepository.findOne(12345)).thenReturn(expectedSpittle);
 6     
 7     SpittleController controller = new SpittleController(mockRepository);
 8     MockMvc mockMvc = standaloneSetup(controller).build();
 9 
10     mockMvc.perform(get("/spittles/12345"))
11       .andExpect(view().name("spittle"))
12       .andExpect(model().attributeExists("spittle"))
13       .andExpect(model().attribute("spittle", expectedSpittle));
14   }

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

1   @RequestMapping(value="/{spittleId}", method=RequestMethod.GET)
2   public String spittle(
3       @PathVariable long spittleId, 
4       Model model) {
5       //The model key will be  spittle 
6     model.addAttribute(spittleRepository.findOne(spittleId));
7     return "spittle";
8   }

3.view

 1 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
 2 <html>
 3   <head>
 4     <title>Spitter</title>
 5     <link rel="stylesheet" 
 6           type="text/css" 
 7           href="<c:url value="/resources/style.css" />" >
 8   </head>
 9   <body>
10     <div class="spittleView">
11       <div class="spittleMessage"><c:out value="${spittle.message}" /></div>
12       <div>
13         <span class="spittleTime"><c:out value="${spittle.time}" /></span>
14       </div>
15     </div>
16   </body>
17 </html>

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原文地址：https://www.cnblogs.com/shamgod/p/5242530.html