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)

  1. package spittr.web;
  2. import java.util.List;
  3. import org.springframework.beans.factory.annotation.Autowired;
  4. import org.springframework.stereotype.Controller;
  5. import org.springframework.web.bind.annotation.RequestMapping;
  6. import org.springframework.web.bind.annotation.RequestMethod;
  7. import spittr.Spittle;
  8. import spittr.data.SpittleRepository;
  9. @Controller
  10. @RequestMapping("/spittles")
  11. public class SpittleController {
  12.     private SpittleRepository spittleRepository;
  13.  
  14.     @Autowired
  15.     public SpittleController(SpittleRepository spittleRepository) {
  16.         this.spittleRepository = spittleRepository;
  17.     }
  18.  
  19.     @RequestMapping(method = RequestMethod.GET)
  20.     public String spittles(Model model) {
  21.         model.addAttribute(spittleRepository.findSpittles(Long.MAX_VALUE, 20));
  22.         return "spittles";
  23.     }
  24. }

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

  1. @RequestMapping(method = RequestMethod.GET)
  2. public List < Spittle > spittles() {
  3.     return spittleRepository.findSpittles(Long.MAX_VALUE, 20));
  4. }

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.  }

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