spring集成Junit做单元测试及常见异常解决办法

<!--Spring-test -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
　　<groupId>org.springframework</groupId>
　　<artifactId>spring-test</artifactId>
　　<version>4.3.7.RELEASE</version>
</dependency>

package com.ssm.test; 

import java.util.List;
import java.util.Map;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.ssm.dao.UserMngDao;

/** 
 * @author wangxiangyu
 * @date：2017年7月18日 下午2:24:50 
 * 类说明：Spring单元测试
 * 1、导入spring-test单元测试的jar包
 * 2、@ContextConfiguration(locations={"classpath:applicationContext.xml"})指定Spring配置文件的位置
 * 3、@RunWith(SpringJUnit4ClassRunner.class)使用Spring单元测试
 * 3、直接autowired要使用的组件
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class MapperTest {

    @Autowired
    UserMngDao userMngDao;
    
    @Test
    public void test1(){
        
        List<Map> users = userMngDao.findAll();
        for(Map user : users){
            String staffName = null==user.get("staffName")?"":user.get("staffName").toString();
            System.out.println(staffName);
        }
        
    }
}

package com.atguigu.crud.test;

import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mock.web.MockHttpServletRequest;
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.MvcResult;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;

import com.atguigu.crud.bean.Employee;
import com.github.pagehelper.PageInfo;

/**
 * 使用Spring测试模块提供的测试请求功能，测试curd请求的正确性
 * Spring4测试的时候，需要servlet3.0的支持
 * @author lfy
 * 
 */
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(locations = { "classpath:applicationContext.xml", "file:src/main/webapp/WEB-INF/dispatcherServlet-servlet.xml" })
public class MvcTest {
    // 传入Springmvc的ioc
    @Autowired
    WebApplicationContext context;
    // 虚拟mvc请求，获取到处理结果。
    MockMvc mockMvc;

    @Before
    public void initMokcMvc() {
        mockMvc = MockMvcBuilders.webAppContextSetup(context).build();
    }

    @Test
    public void testPage() throws Exception {
        //模拟请求拿到返回值
        MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get("/emps").param("pn", "5")).andReturn();
        
        //请求成功以后，请求域中会有pageInfo；我们可以取出pageInfo进行验证
        MockHttpServletRequest request = result.getRequest();
        PageInfo pi = (PageInfo) request.getAttribute("pageInfo");
        System.out.println("当前页码："+pi.getPageNum());
        System.out.println("总页码："+pi.getPages());
        System.out.println("总记录数："+pi.getTotal());
        System.out.println("在页面需要连续显示的页码");
        int[] nums = pi.getNavigatepageNums();
        for (int i : nums) {
            System.out.print(" "+i);
        }
        
        //获取员工数据
        List<Employee> list = pi.getList();
        for (Employee employee : list) {
            System.out.println("ID："+employee.getEmpId()+"==>Name:"+employee.getEmpName());
        }
        
    }

}