基于maven+ssm的增删改查之测试相关ssm环境是否成功

Posted 2021-03-13 西西嘛呦

接上一节。

1、首先我们在com.gong.curd.controller中新建EmployeeController.java（我们使用分页技术）

package com.gong.curd.controller;

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.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.gong.curd.bean.Employee;
import com.gong.curd.service.EmployeeService;

@Controller
public class EmployeeController {
    
    @Autowired
    EmployeeService employeeService;
    
    @RequestMapping("/emps")
    public String getEmps(@RequestParam(value="pn",defaultValue="1") Integer pn,
            Model model) {
        PageHelper.startPage(pn,5);
        List<Employee> emps = employeeService.getAll();
        PageInfo<Employee> page = new PageInfo<>(emps,5);
        model.addAttribute("pageInfo", page);
        return "list";
    }
}

2、在com.gong.curd.service新建EmployeeService.java

package com.gong.curd.service;

import java.util.List;

import com.gong.curd.bean.Employee;

public interface EmployeeService {
    public List<Employee> getAll();
}

3、在com.gong.serviceImpl新建EmployeeServiceImpl.java

package com.gong.curd.serviceImpl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.gong.curd.bean.Employee;
import com.gong.curd.dao.EmployeeMapper;
import com.gong.curd.service.EmployeeService;

@Service
public class EmployeeServiceImpl implements EmployeeService {
    
    @Autowired
    EmployeeMapper employeeMapper;
    
    public List<Employee> getAll() {
        return employeeMapper.selectByExampleWithDept(null);
    }

}

4、在com.gong.curd.text新建MvcTest.java用于测试ssm环境：同样的，我们转换成ssm环境进行测试时，需要指定spring和springmvc配置文件。我们在views文件夹下新建一个list.jsp文件，里面暂时按默认就好，不需要添加其他的信息。

package com.gong.curd.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.curd.bean.Employee;
import com.github.pagehelper.PageInfo;

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(locations= {"classpath:applicationContext.xml",
            "file:src/main/webapp/WEB-INF/dispatcherServlet-servlet.xml"})
public class MvcTest {
    
    @Autowired
    WebApplicationContext context;
    MockMvc mockMvc;
    
    @Before
    public void initMockMvc() {
        mockMvc = MockMvcBuilders.webAppContextSetup(context).build();
    }
    
    @Test
    public void testPage() throws Exception {
        //模拟请求
        MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get("/emps").param("pn", "1"))
            .andReturn();
        
        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("连续显示页码：");
        int[] nums = pi.getNavigatepageNums();
        for(int i : nums) {
            System.out.println(""+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());
        }
    }
}

我们模拟发送请求到"/emps"，并带上参数pn，运行之后：控制台看到输出

DEBUG [main] - Forwarding to resource [/WEB-INF/views/list.jsp] in InternalResourceView ‘list‘
DEBUG [main] - MockRequestDispatcher: forwarding to [/WEB-INF/views/list.jsp]
DEBUG [main] - Successfully completed request
DEBUG [main] - Returning cached instance of singleton bean ‘sqlSessionFactory‘
当前页码：1
总页码：10
总记录数：49
连续显示页码：
1
2
3
4
5
ID:1==>Name:tom
deptName: 开发部
ID:2==>Name:f4aa02
deptName: 开发部
ID:3==>Name:6fcaa3
deptName: 开发部
ID:4==>Name:4864d4
deptName: 开发部
ID:5==>Name:5a3135
deptName: 开发部

说明我们自己定义的Mybatis语句以及ssm环境是成功的。下一节将结合分页技术，利用bootstrap实现员工信息在前端进行显示。