一、RequestMapping
1.可以写在方法上或类上，且值可以是数组
1 package spittr.web;
2
3 import static org.springframework.web.bind.annotation.RequestMethod.*;
4
5 import org.springframework.stereotype.Controller;
6 import org.springframework.ui.Model;
7 import org.springframework.web.bind.annotation.RequestMapping;
8
9 @Controller
10 //@Component //也可用这个,但没有见名知义
11 //@RequestMapping("/")
12 @RequestMapping({"/", "/homepage"})
13 public class HomeController {
14
15 //@RequestMapping(value="/", method=GET)
16 @RequestMapping(method = GET)
17 public String home(Model model) {
18 return "home";
19 }
20
21 }
2.测试
1 package spittr.web;
2 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
3 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
4 import static org.springframework.test.web.servlet.setup.MockMvcBuilders.*;
5
6 import org.junit.Test;
7 import org.springframework.test.web.servlet.MockMvc;
8
9 import spittr.web.HomeController;
10
11 public class HomeControllerTest {
12
13 @Test
14 public void testHomePage() throws Exception {
15 HomeController controller = new HomeController();
16 MockMvc mockMvc = standaloneSetup(controller).build();
17 mockMvc.perform(get("/homepage"))
18 .andExpect(view().name("home"));
19 }
20
21 }
3.jsp
1 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> 2 <%@ page session="false" %> 3 <html> 4 <head> 5 <title>Spitter</title> 6 <link rel="stylesheet" 7 type="text/css" 8 href="<c:url value="/resources/style.css" />" > 9 </head> 10 <body> 11 <h1>Welcome to Spitter</h1> 12 13 <a href="<c:url value="/spittles" />">Spittles</a> | 14 <a href="<c:url value="/spitter/register" />">Register</a> 15 </body> 16 </html>
二、在controller中使用model,model实际就是一个map
1.controller
(1)
package spittr.web;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import spittr.Spittle;
import spittr.data.SpittleRepository;
@Controller
@RequestMapping("/spittles")
public class SpittleController {
private SpittleRepository spittleRepository;
@Autowired
public SpittleController(SpittleRepository spittleRepository) {
this.spittleRepository = spittleRepository;
}
@RequestMapping(method = RequestMethod.GET)
public String spittles(Model model) {
model.addAttribute(spittleRepository.findSpittles(Long.MAX_VALUE, 20));
return "spittles";
}
}
如果在addAttribute时没有指定key，则spring会根据存入的数据类型来生成key,如上面存入的数据类型是List<Spittle>,所以key就是spittleList
(2)也可以明确key
1 @RequestMapping(method = RequestMethod.GET)
2 public String spittles(Model model) {
3 model.addAttribute("spittleList",spittleRepository.findSpittles(Long.MAX_VALUE, 20));
4 return "spittles";
5 }
(3)也可用map替换model
1 @RequestMapping(method = RequestMethod.GET)
2 public String spittles(Map model) {
3 model.put("spittleList",spittleRepository.findSpittles(Long.MAX_VALUE, 20));
4 return "spittles";
5 }
(4)不返回string，直接返回数据类型
@RequestMapping(method = RequestMethod.GET)
public List < Spittle > spittles() {
return spittleRepository.findSpittles(Long.MAX_VALUE, 20));
}
When a handler method returns an object or a collection like this, the value returned is put into the model, and the model key is inferred from its type ( spittleList , as in the other examples).
As for the logical view name, it’s inferred from the request path. Because this method handles GET requests for /spittles, the view name is spittles (chopping off the leading slash).
2.View
在jsp中用jstl解析数据
1 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
2 <%@ taglib prefix="s" uri="http://www.springframework.org/tags"%>
3 <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
4
5 <html>
6 <head>
7 <title>Spitter</title>
8 <link rel="stylesheet" type="text/css" href="<c:url value="/resources/style.css" />" >
9 </head>
10 <body>
11 <div class="spittleForm">
12 <h1>Spit it out...</h1>
13 <form method="POST" name="spittleForm">
14 <input type="hidden" name="latitude">
15 <input type="hidden" name="longitude">
16 <textarea name="message" cols="80" rows="5"></textarea><br/>
17 <input type="submit" value="Add" />
18 </form>
19 </div>
20 <div class="listTitle">
21 <h1>Recent Spittles</h1>
22 <ul class="spittleList">
23 <c:forEach items="${spittleList}" var="spittle" >
24 <li id="spittle_<c:out value="spittle.id"/>">
25 <div class="spittleMessage"><c:out value="${spittle.message}" /></div>
26 <div>
27 <span class="spittleTime"><c:out value="${spittle.time}" /></span>
28 <span class="spittleLocation">(<c:out value="${spittle.latitude}" />, <c:out value="${spittle.longitude}" />)</span>
29 </div>
30 </li>
31 </c:forEach>
32 </ul>
33 <c:if test="${fn:length(spittleList) gt 20}">
34 <hr />
35 <s:url value="/spittles?count=${nextCount}" var="more_url" />
36 <a href="${more_url}">Show more</a>
37 </c:if>
38 </div>
39 </body>
40 </html>
3.测试
1 package spittr.web;
2 import static org.hamcrest.Matchers.*;
3 import static org.mockito.Mockito.*;
4 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
5 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
6 import static org.springframework.test.web.servlet.setup.MockMvcBuilders.*;
7
8 import java.util.ArrayList;
9 import java.util.Date;
10 import java.util.List;
11
12 import org.junit.Test;
13 import org.springframework.test.web.servlet.MockMvc;
14 import org.springframework.web.servlet.view.InternalResourceView;
15
16 import spittr.Spittle;
17 import spittr.data.SpittleRepository;
18 import spittr.web.SpittleController;
19
20 public class SpittleControllerTest {
21
22 @Test
23 public void shouldShowRecentSpittles() throws Exception {
24 List<Spittle> expectedSpittles = createSpittleList(20);
25 SpittleRepository mockRepository = mock(SpittleRepository.class);
26 when(mockRepository.findSpittles(Long.MAX_VALUE, 20))
27 .thenReturn(expectedSpittles);
28
29 SpittleController controller = new SpittleController(mockRepository);
30 MockMvc mockMvc = standaloneSetup(controller)
31 .setSingleView(new InternalResourceView("/WEB-INF/views/spittles.jsp"))
32 .build();
33
34 mockMvc.perform(get("/spittles"))
35 .andExpect(view().name("spittles"))
36 .andExpect(model().attributeExists("spittleList"))
37 .andExpect(model().attribute("spittleList",
38 hasItems(expectedSpittles.toArray())));
39 }
40
41 @Test
42 public void shouldShowPagedSpittles() throws Exception {
43 List<Spittle> expectedSpittles = createSpittleList(50);
44 SpittleRepository mockRepository = mock(SpittleRepository.class);
45 when(mockRepository.findSpittles(238900, 50))
46 .thenReturn(expectedSpittles);
47
48 SpittleController controller = new SpittleController(mockRepository);
49 MockMvc mockMvc = standaloneSetup(controller)
50 .setSingleView(new InternalResourceView("/WEB-INF/views/spittles.jsp"))
51 .build();
52
53 mockMvc.perform(get("/spittles?max=238900&count=50"))
54 .andExpect(view().name("spittles"))
55 .andExpect(model().attributeExists("spittleList"))
56 .andExpect(model().attribute("spittleList",
57 hasItems(expectedSpittles.toArray())));
58 }
59
60 @Test
61 public void testSpittle() throws Exception {
62 Spittle expectedSpittle = new Spittle("Hello", new Date());
63 SpittleRepository mockRepository = mock(SpittleRepository.class);
64 when(mockRepository.findOne(12345)).thenReturn(expectedSpittle);
65
66 SpittleController controller = new SpittleController(mockRepository);
67 MockMvc mockMvc = standaloneSetup(controller).build();
68
69 mockMvc.perform(get("/spittles/12345"))
70 .andExpect(view().name("spittle"))
71 .andExpect(model().attributeExists("spittle"))
72 .andExpect(model().attribute("spittle", expectedSpittle));
73 }
74
75 @Test
76 public void saveSpittle() throws Exception {
77 SpittleRepository mockRepository = mock(SpittleRepository.class);
78 SpittleController controller = new SpittleController(mockRepository);
79 MockMvc mockMvc = standaloneSetup(controller).build();
80
81 mockMvc.perform(post("/spittles")
82 .param("message", "Hello World") // this works, but isn‘t really testing what really happens
83 .param("longitude", "-81.5811668")
84 .param("latitude", "28.4159649")
85 )
86 .andExpect(redirectedUrl("/spittles"));
87
88 verify(mockRepository, atLeastOnce()).save(new Spittle(null, "Hello World", new Date(), -81.5811668, 28.4159649));
89 }
90
91 private List<Spittle> createSpittleList(int count) {
92 List<Spittle> spittles = new ArrayList<Spittle>();
93 for (int i=0; i < count; i++) {
94 spittles.add(new Spittle("Spittle " + i, new Date()));
95 }
96 return spittles;
97 }
98 }
时间： 2024-12-14 09:31:30