使用ssm框架进行整合，实现一个小的项目，对员工信息的增删改查

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEconfiguration
PUBLIC"-//mybatis.org//DTDConfig3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!--全局配置驼峰命名规则-->
<settingname="mapUnderscoreToCamelCase"value="true"/>
</settings>
<typeAliases>
<packagename="com.linzhw.crud.bean"/>
</typeAliases>
<plugins>
<plugininterceptor="com.github.pagehelper.PageInterceptor">
<!--分页参数合理化-->
<propertyname="reasonable"value="true"/>
</plugin>
</plugins>
</configuration>

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEgeneratorConfiguration
PUBLIC"-//mybatis.org//DTDMyBatisGeneratorConfiguration1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!--数据库驱动包位置-->
<!--<classPathEntrylocation="E:\repository\mysql\mysql-connector-java\5.1.41\mysql-connector-java-5.1.41.jar"/>-->

<contextid="DB2Tables"targetRuntime="MyBatis3">

<!--生成的文件取消注释设value="true"-->
<commentGenerator>
<propertyname="suppressAllComments"value="true"/>
</commentGenerator>

<!--配置数据库连接-->
<jdbcConnection
driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3366/ssm_crud"
userId="root"
password="123456">
</jdbcConnection>

<javaTypeResolver>
<propertyname="forceBigDecimals"value="false"/>
</javaTypeResolver>

<!--指定javaBean生成的位置-->
<javaModelGenerator
targetPackage="com.linzhw.crud.bean"
targetProject=".\src\main\java">
<propertyname="enableSubPackages"value="true"/>
<propertyname="trimStrings"value="true"/>
</javaModelGenerator>

<!--指定sql映射文件生成的位置-->
<sqlMapGenerator
targetPackage="mapper"
targetProject=".\src\main\resources">
<propertyname="enableSubPackages"value="true"/>
</sqlMapGenerator>

<!--指定dao接口生成的位置，mapper接口-->
<javaClientGeneratortype="XMLMAPPER"
targetPackage="com.linzhw.crud.dao"
targetProject=".\src\main\java">
<propertyname="enableSubPackages"value="true"/>
</javaClientGenerator>

<!--table指定每个表的生成策略-->
<tabletableName="tbl_emp"domainObjectName="Emplovee"></table>
<tabletableName="tnl_dept"domainObjectName="Department"></table>
</context>
</generatorConfiguration>

packagecom.linzhw.crud.test;

importjava.io.File;
importjava.util.ArrayList;
importjava.util.List;

importorg.mybatis.generator.api.MyBatisGenerator;
importorg.mybatis.generator.config.Configuration;
importorg.mybatis.generator.config.xml.ConfigurationParser;
importorg.mybatis.generator.internal.DefaultShellCallback;

publicclassMBGTest{
publicstaticvoidmain(String[]args)throwsException{
List<String>warnings=newArrayList<String>();
booleanoverwrite=true;
FileconfigFile=newFile("mbg.xml");
ConfigurationParsercp=newConfigurationParser(warnings);
Configurationconfig=cp.parseConfiguration(configFile);
DefaultShellCallbackcallback=newDefaultShellCallback(overwrite);
MyBatisGeneratormyBatisGenerator=newMyBatisGenerator(config,callback,warnings);
myBatisGenerator.generate(null);
}

}

List<Employee>selectByExampleWithDept(EmployeeExampleexample);

EmployeeselectByPrimaryKeyWithDept(IntegerempId);

//希望查询员工信息的同时部门信息也是查询好的
privateDepartmentdepartment;

publicDepartmentgetDepartment(){
returndepartment;
}

publicvoidsetDepartment(Departmentdepartment){
this.department=department;
}

<sqlid="WithDept_Column_List">
e.emp_id,e.emp_name,e.gender,e.email,e.d_id,d.dept_id,d.dept_name
</sql>

<selectid="selectByExampleWithDept"resultMap="WithDeptResultMap">
select
<iftest="distinct">
distinct
</if>
<includerefid="WithDept_Column_List"/>
FROMtbl_empe
leftjointnl_deptdone.d_id=d.dept_id
<iftest="_parameter!=null">
<includerefid="Example_Where_Clause"/>
</if>
<iftest="orderByClause!=null">
orderby${orderByClause}
</if>
</select>

<resultMapid="WithDeptResultMap"type="com.linzhw.crud.bean.Employee">
<idcolumn="emp_id"jdbcType="INTEGER"property="empId"/>
<resultcolumn="emp_name"jdbcType="VARCHAR"property="empName"/>
<resultcolumn="gender"jdbcType="CHAR"property="gender"/>
<resultcolumn="email"jdbcType="VARCHAR"property="email"/>
<resultcolumn="d_id"jdbcType="INTEGER"property="dId"/>
<!--关联department信息指定联合查询出的字段信息封装-->
<associationproperty="department"javaType="com.linzhw.crud.bean.Department">
<idcolumn="dept_id"property="deptId"/>
<resultcolumn="dept_name"property="deptName"/>
</association>
</resultMap>

<!--查询员工同时带部门信息-->
<selectid="selectByPrimaryKeyWithDept"parameterType="java.lang.Integer"resultMap="WithDeptResultMap">
select
<includerefid="WithDept_Column_List"/>
FROMtbl_empe
leftjointnl_deptdone.d_id=d.dept_id
whereemp_id=#{empId,jdbcType=INTEGER}
</select>

packagecom.linzhw.crud.test;

importjava.util.UUID;

importorg.apache.ibatis.session.SqlSession;
importorg.junit.Test;
importorg.junit.runner.RunWith;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
importorg.springframework.test.context.ContextConfiguration;
importorg.springframework.test.context.junit4.SpringJUnit4ClassRunner;

importcom.linzhw.crud.bean.Department;
importcom.linzhw.crud.bean.Employee;
importcom.linzhw.crud.dao.DepartmentMapper;
importcom.linzhw.crud.dao.EmployeeMapper;

/**
*测试dao层的工作
*推荐：Spring的项目就可以使用Spring的单元测试，可以自动注入我们需要的组件
*		1、导入SpringTest模块
*		2、@ContextConfiguration指定Spring配置文件的位置
*		3、直接autowired要使用的组件即可
*@authorlinzhw
*@creationTime2017年12月19日下午8:04:40
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
publicclassMapperTest{

@Autowired
DepartmentMapperdepartmentMapper;

@Autowired
EmployeeMapperemploveeMapper;

@Autowired
SqlSessionsqlSession;

/**
*测试DepartmentMapper
*/
@Test
publicvoidtestCRUD(){
/*//1、创建SpringIOC容器
ApplicationContextioc=newClassPathXmlApplicationContext("applicationContext.xml");
//2、从容器中获取mapper
DepartmentMapperbean=ioc.getBean(DepartmentMapper.class);*/

System.out.println(departmentMapper);

//1、插入几个部门
//		departmentMapper.insertSelective(newDepartment(null,"研发部"));
//		departmentMapper.insertSelective(newDepartment(null,"事业部"));

//2、生成员工数据，测试员工插入
//employeeMapper.insertSelective(newEmployee(null,"session","F","session@163.com",2));

//System.out.println("插入成功");

//3、批量插入多个员工；批量，使用可以执行批量操作的sqlSession

/*for(){
employeeMapper.insertSelective(newEmployee(null,"Jerry1","F","Jerry1@163.com",2));

}*/
EmployeeMappermapper=sqlSession.getMapper(EmployeeMapper.class);
for(inti=0;i<10;i++){
Stringuid=UUID.randomUUID().toString().substring(0,5)+i;
mapper.insertSelective(newEmployee(null,uid,"M",uid+"@github.com",4));
}
System.out.println("批量新增完成");
}
}

@Service
publicclassEmployeeService{

@Autowired
EmployeeMapperemployeeMapper;

/**
*查询所有员工
*@return
*/
publicList<Employee>getAll(){
returnemployeeMapper.selectByExampleWithDept(null);
}
}

@Controller
publicclassEmployeeController{

@Autowired
EmployeeServiceemployeeService;

@RequestMapping("/emps")						//默认显示第一页
publicStringgetEmps(@RequestParam(value="pn",defaultValue="1")Integerpn,Modelmodel){
//这不是一个分页查询
//引入PageHelper分页插件
//在查询之前只需要调用,传入页码，以及每页的大小
PageHelper.startPage(pn,5);
//startPage后面紧跟的这个查询就是一个分页查询
List<Employee>emps=employeeService.getAll();
//使用pageInfo包装查询后的结果,只需要将pageInfo交给页面就行
//封装详细的分页信息，包括有我们查询出来的数据,传入连续显示的页数
PageInfopage=newPageInfo(emps,5);
model.addAttribute("pageInfo",page);

return"list";
}
}

packagecom.linzhw.crud.test;

importjava.util.List;

importorg.junit.Before;
importorg.junit.Test;
importorg.junit.runner.RunWith;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.mock.web.MockHttpServletRequest;
importorg.springframework.test.context.ContextConfiguration;
importorg.springframework.test.context.junit4.SpringJUnit4ClassRunner;
importorg.springframework.test.context.web.WebAppConfiguration;
importorg.springframework.test.web.servlet.MockMvc;
importorg.springframework.test.web.servlet.MvcResult;
importorg.springframework.test.web.servlet.request.MockMvcRequestBuilders;
importorg.springframework.test.web.servlet.setup.MockMvcBuilders;
importorg.springframework.web.context.WebApplicationContext;

importcom.github.pagehelper.PageInfo;
importcom.linzhw.crud.bean.Employee;

/**
*使用Spring测试模块提供的测试请求功能，测试crud请求正确性
*Spring4测试的时候，需要serclet3.0的支持
*@authorlinzhw
*@creationTime2017年12月21日下午9:46:04
*/
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(locations={"classpath:applicationContext.xml","file:src/main/webapp/WEB-INF/dispatcherServlet-servlet.xml"})
publicclassMvcTest{
//传入Springmvc的ioc
@Autowired
WebApplicationContextcontext;
//虚拟mvc请求，获取到处理结果
MockMvcmockMvc;

@Before
publicvoidinitMockCMvc(){
mockMvc=MockMvcBuilders.webAppContextSetup(context).build();
}

@Test
publicvoidtestPage()throwsException{
//模拟请求拿到返回值														//显示第几页
MvcResultresult=mockMvc.perform(MockMvcRequestBuilders.get("/emps").param("pn","2")).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
MockHttpServletRequestrequest=result.getRequest();
PageInfopi=(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(inti:nums){
System.out.println(""+i);
}

//获取员工数据
List<Employee>list=pi.getList();
for(Employeeemployee:list){
System.out.println("ID:"+employee.getEmpId()+"===Name:"+employee.getEmpName());
}
}
}

<%@pagelanguage="java"contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8"%>
<jsp:forwardpage="/emps"></jsp:forward>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML4.01Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=UTF-8">
<title>Inserttitlehere</title>

<scripttype="text/javascript"src="static/js/jquery1.32.min.js"></script>

<linkhref="static/bootstrap-3.3.7-dist/css/bootstrap.min.css"rel="stylesheet">
<scriptsrc="static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
</head>
<body>
<buttontype="button"class="btnbtn-success">按钮</button>
</body>
</html>

<%@pagelanguage="java"contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8"%>
<%@tagliburi="http://java.sun.com/jsp/jstl/core"prefix="c"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML4.01Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=UTF-8">
<title>员工列表</title>
<%
pageContext.setAttribute("APP_PATH",request.getContextPath());
%>
<!--web路径：
不以/开始的相对路径，找资源，以当前资源的路径为基准，经常容易出现问题
以/开始的相对路径，找资源，以服务器的路径为标准(http://localhost:3366);需要加上项目名http://localhost:3366/crud-->
<scripttype="text/javascript"src="${APP_PATH}/static/js/jquery1.32.min.js"></script>
<linkhref="${APP_PATH}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css"rel="stylesheet">
<scriptsrc="${APP_PATH}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
</head>
<body>
<!--搭建显示页面-->
<divclass="container">
<!--标题-->
<divclass="row">
<divclass="col-md-12">
<h1>SSM-CRUD</h1>
</div>
</div>
<!--按钮-->
<divclass="row">
<divclass="col-md-4col-md-offset-8">
<buttonclass="btnbtn-primary">新增</button>
<buttonclass="btnbtn-danger">删除</button>
</div>
</div>
<!--显示表格数据-->
<divclass="row">
<divclass="col-md-12">
<tableclass="tabletable-hover">
<tr>
<th>#</th>
<th>empName</th>
<th>gender</th>
<th>email</th>
<th>deptName</th>
<th>操作</th>
</tr>
<c:forEachitems="${pageInfo.list}"var="emp">
<tr>
<th>${emp.empId}</th>
<th>${emp.empName}</th>
<th>${emp.gender=="M"?"男":"女"}</th>
<th>${emp.email}</th>
<th>${emp.department.deptName}</th>
<th>
<buttonclass="btn-primarybtn-sm">
<spanclass="glyphiconglyphicon-pencil"aria-hidden="true"></span>
编辑
</button>
<buttonclass="btn-dangerbtn-sm">
<spanclass="glyphiconglyphicon-trash"aria-hidden="true"></span>
删除
</button>
</th>
</tr>
</c:forEach>
</table>
</div>
<!--显示分页信息-->
<divclass="row">
<!--分页文字信息-->
<divclass="col-md-6">
当前${pageInfo.pageNum}页,总${pageInfo.pages}页,总${pageInfo.total}条记录
</div>
<!--分页条信息-->
<divclass="col-md-6">
<navaria-label="Pagenavigation">
<ulclass="pagination">
<li><ahref="${APP_PATH}/emps?pn=1">首页</a></li>
<c:iftest="${pageInfo.hasPreviousPage}">
<li>
<ahref="${APP_PATH}/emps?pn=${pageInfo.pageNum-1}"aria-label="Previous">
<spanaria-hidden="true">«</span>
</a>
</li>
</c:if>
<c:forEachitems="${pageInfo.navigatepageNums}"var="page_Num">
<c:iftest="${page_Num==pageInfo.pageNum}">
<liclass="active"><ahref="#">${page_Num}</a></li>
</c:if>
<c:iftest="${page_Num!=pageInfo.pageNum}">
<li><ahref="${APP_PATH}/emps?pn=${page_Num}">${page_Num}</a></li>
</c:if>
</c:forEach>
<c:iftest="${pageInfo.hasNextPage}">
<li>
<ahref="${APP_PATH}/emps?pn=${pageInfo.pageNum+1}"aria-label="Next">
<spanaria-hidden="true">»</span>
</a>
</li>
</c:if>
<li><ahref="${APP_PATH}/emps?pn=${pageInfo.pages}">末页</a></li>
</ul>
</nav>
</div>
</div>
<divclass="row"></div>
</div>
</body>
</html>