第一次搭建SSM框架，整合SpringMVC完成后进行Controller测试，找资料并解决问题。
下图是我的完整目录：
1 建立UserController类
代码清单 1-1：UserController.java
package org.sei.controller;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.sei.pojo.User; import org.sei.service.UserService; @Controller @RequestMapping("/user") public class UserController { @Resource private UserService userService; @RequestMapping("/showUser1") public String toIndex(HttpServletRequest request,Model model) { int userId = Integer.parseInt(request.getParameter("id")); User user = this.userService.getUserById(userId); model.addAttribute("user", user); return user.getUserName(); } @RequestMapping("/showUser3") public String toIndex1(User u,Model model) //注意：参数不同 { int userId = u.getId(); User user = this.userService.getUserById(userId); model.addAttribute("user", user); return user.getUserName(); } } 2 建立测试类
代码清单 2-1：MockTestController.java
package org.sei.testmybatis;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.MediaType; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import org.springframework.test.context.web.WebAppConfiguration; import org.springframework.test.web.servlet.MockMvc; import org.springframework.test.web.servlet.setup.MockMvcBuilders; import org.springframework.web.context.WebApplicationContext; import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get; import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print; import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations={"classpath:spring-mybatis.xml","classpath:spring-mvc.xml"}) @WebAppConfiguration public class MockTestController { protected MockMvc mockMvc; @Autowired protected WebApplicationContext wac; @Before() //这个方法在每个方法执行之前都会执行一遍 public void setup() { mockMvc = MockMvcBuilders.webAppContextSetup(wac).build(); //初始化MockMvc对象 } @Test public void getAllCategoryTest() throws Exception { String responseString = mockMvc.perform ( get("/user/showUser1") //请求的url,请求的方法是get //get("/user/showUser2") //请求的url,请求的方法是get .contentType(MediaType.APPLICATION_FORM_URLENCODED)//数据的格式 .param("id","1") //添加参数(可以添加多个) //.param("id","3") //添加参数(可以添加多个) ) .andExpect(status().isOk()) //返回的状态是200 .andDo(print()) //打印出请求和相应的内容 .andReturn().getResponse().getContentAsString(); //将相应的数据转换为字符串 System.out.println("-----返回的json = " + responseString); } } 3 JUnit测试
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测试的数据库表如下：
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测试1：参数(HttpServletRequest request,Model model)
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测试2：参数(User u,Model model)
4 几个jar包
很多问题都来自于确少jar包。
下面给出几个jar包的Maven依赖：
代码清单 4-1：pom.xml (局部)
<dependency>
<groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <!-- 映入JSON --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.8.3</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.8.3</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.8.3</version> </dependency> 来源：https://www.cnblogs.com/oucbl/p/5943743.html