SSM架构（二）

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SSM框架(一)-CSDN博客

2.4 Spring

2.4.1 Service设计

EmployeeService接口代码：

    List<Emp> search(Emp condition);Emp searchById(Integer id);boolean add(Emp emp);boolean update(Emp emp);boolean delete(Integer id);

EmployeeServiceImpl实现类代码：

@Service
public class EmpServiceImpl implements EmpService {@AutowiredEmpDao empDao;@Overridepublic List<Emp> search(Emp condition) {List<Emp> list = empDao.search(condition);return list;}@Overridepublic Emp searchById(Integer id) {Emp emp = empDao.searchById(id);return emp;}@Overridepublic boolean add(Emp emp) {int rs = empDao.add(emp);return rs > 0;}@Overridepublic boolean update(Emp emp) {int rs = empDao.update(emp);return rs > 0;}@Overridepublic boolean delete(Integer id) {int rs = empDao.delete(id);return rs > 0;}
}

DepartmentService 接口代码：

    public List<Dep> search();public Dep searchById(Integer id);public boolean add(Dep dep);public boolean update(Dep dep);public boolean delete(Integer id);

DepartmentServiceImpl 实现类代码：

@Service
public class DepServiceImpl implements DepService {@AutowiredDepDao depDao;@AutowiredEmpDao empDao;@Overridepublic List<Dep> search() {List<Dep> list = depDao.search();return list;}@Overridepublic Dep searchById(Integer id) {Dep dep = depDao.searchById(id);return dep;}@Overridepublic boolean add(Dep dep) {int rs = depDao.add(dep);return rs > 0;}@Overridepublic boolean update(Dep dep) {int rs = depDao.update(dep);return rs > 0;}@Overridepublic boolean delete(Integer id) {int rs = depDao.delete(id);rs = empDao.updateByDep(id);return rs > 0;}
}

2.5 Spring MVC

Spring MVC的DispatcherServlet的使用与配置，基于注解映射机制。

2.5.1 Controller设计

EmployeeController实现代码：

@Controller
@RequestMapping("emp")
public class EmpController {@AutowiredEmpService empService;@AutowiredDepService depService;@RequestMapping("search")public ModelAndView search(Emp condition) {ModelAndView mv = new ModelAndView("emp/show");List<Emp> list = empService.search(condition);List<Dep> depList=depService.search();mv.addObject("list", list);mv.addObject("depList",depList);mv.addObject("c", condition);return mv;}@RequestMapping("showAdd")public ModelAndView showAdd() {ModelAndView mv = new ModelAndView("emp/add");List<Dep> depList = depService.search();mv.addObject("depList", depList);return mv;}@RequestMapping("add")public String add(Emp emp) {boolean flag = empService.add(emp);return "redirect:search";}@RequestMapping("showUpdate")public ModelAndView showUpdate(Integer id) {Emp emp = empService.searchById(id);List<Dep> depList = depService.search();ModelAndView mv = new ModelAndView("emp/update");mv.addObject("emp", emp);mv.addObject("depList", depList);return mv;}@RequestMapping(value="update")public String update(Emp emp) {boolean flag = empService.update(emp);return "redirect:search";}@RequestMapping("delete")public String delete(Integer id) {boolean flag = empService.delete(id);return "redirect:search";}
}

DepartmentController 实现代码：

@Controller
@RequestMapping("dep")
public class DepController {@AutowiredDepService depService;@RequestMapping("search")public ModelAndView search() {ModelAndView mv = new ModelAndView("dep/show");List<Dep> list = depService.search();mv.addObject("list", list);return mv;}@RequestMapping("showAdd")public String showAdd() {return "dep/add";}@RequestMapping("add")public String add(Dep dep) {boolean flag = depService.add(dep);return "redirect:search";}@RequestMapping("showUpdate")public ModelAndView showUpdat(Integer id) {ModelAndView mv = new ModelAndView("dep/update");Dep dep = depService.searchById(id);mv.addObject("dep", dep);return mv;}@RequestMapping("update")public String update(Dep dep) {boolean flag = depService.update(dep);return "redirect:search";}@RequestMapping("delete")public String delete(Integer id) {boolean flag = depService.delete(id);return "redirect:search";}
}

2.6 JSP(View层)

2.6.1 emp

add.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head><title></title><style>#container {width: 700px;margin: 10px auto;}#container form .align {margin: 8px 0;}</style>
</head>
<body>
<div id="container"><form action="add"><div class="align"><label>编号</label><input type="text" placeholder="请输入编号"name="number"></div><div class="align"><label>名字</label><input type="text" placeholder="请输入名字" name="name"></div><div class="align"><label>性别</label><input type="radio" value="男" name="gender"/>男<input type="radio" value="女" name="gender"/>女</div><div class="align"><label>年龄</label><input type="text" placeholder="请输入年龄" name="age"></div><div class="align"><label>部门</label><select name="dep.id"><c:forEach var="dep" items="${depList }"><option value="${dep.id }">${dep.name }</option></c:forEach></select></div><div class="align"><button type="submit">保存</button></div></form>
</div>
</body>
</html>

show.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head><title>员工展示</title><style>#container {width: 700px;margin: 10px auto;}#container #search{overflow: hidden;}#container #search .align{float:left;margin-right:8px;}#container #search input{width:160px;}#container #data {clear: both;width: 700px;margin:10px 0;}</style>
</head>
<body>
<div id="container"><form id="search" action="search" method="post"><div class="align"><input type="text" name="number"placeholder="编号" value=${c.number}></div><div class="align"><input type="text" name="name"placeholder="姓名" value=${c.name}></div><div class="align"><select name="gender"><option value="">性别</option><option value="男" <c:if test="${c.gender =='男'}">selected</c:if>>男</option><option value="女" <c:if test="${c.gender =='女'}">selected</c:if>>女</option></select></div><div class="align"><input type="text" name="age" placeholder="年龄"value=${c.age!=null?c.age:''}></div><div class="align"><select name="dep.id"><option value="">部门</option><c:forEach items="${depList}" var="dep"><option value="${dep.id }"<c:if test="${dep.id ==c.dep.id}">selected</c:if>>${dep.name }</option></c:forEach></select></div><div class="align"><button type="submit">搜索</button></div></form><table id="data" border="1" ><tr><th>编号</th><th>名字</th><th>性别</th><th>年龄</th><th>部门</th></tr><c:forEach items="${list}" var="data"><tr><td>${data.number }</td><td>${data.name }</td><td>${data.gender }</td><td>${data.age }</td><td>${data.dep.name }</td></tr></c:forEach></table><button type="button" id="add">新增</button><button type="button" id="update">修改</button><button type="button" id="delete">删除</button>
</div>
</body>
</html>

update.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head><title>修改员工</title><style>#container {width: 700px;margin: 10px auto;}#container form .align{margin:8px 0;}</style>
</head>
<body>
<div id="container"><form action="update"><input type="hidden" name="id" value="${emp.id}"><div class="align"><label>编号</label><input type="text" placeholder="请输入编号"name="number" value="${emp.number}"></div><div class="align"><label>名字</label><input type="text" placeholder="请输入名字"name="name" value="${emp.name}"></div><div class="align"><label>性别</label><input type="radio" value="男" name="gender"<c:if test="${emp.gender=='男'}">checked</c:if> />男<input type="radio" value="女" name="gender"<c:if test="${emp.gender=='女'}">checked</c:if> />女</div><div class="align"><label>年龄</label><input type="text" placeholder="请输入年龄" name="age"value="${emp.age}"></div><div class="align"><label>部门</label><select name="dep.id"><c:forEach var="dep" items="${depList }">2.6.2 depadd.jsp<option value="${dep.id }"<c:if test="${emp.dep.id==dep.id}">selected</c:if> >${dep.name }</option></c:forEach></select></div><div class="align"><button type="submit">保存</button></div></form>
</div>
</body>
</html>

2.6.2 dep

add.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8" %>
<html>
<head><title>部门新增</title><style>#container {width: 400px;margin: 10px auto;}#container form .align {margin: 8px 0;}</style>
</head>
<body>
<div id="container"><form action="add"><div class="align"><label>编号</label><input type="text" placeholder="请输入编号" name="number"></div><div class="align"><label>名称</label><input type="text" placeholder="请输入名称" name="name"></div><div class="align"><button type="submit">保存</button></div></form>
</div>
</body>
</html>

show.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head><title>部门展示</title><style>#container {width: 400px;margin: 10px auto;}#container #data {clear: both;width: 400px;margin: 10px 0;}</style>
</head>
<body>
<div id="container"><table id="data" border="1px"><tr><th>编号</th><th>名称</th></tr><c:forEach items="${list}" var="data"><tr><td>${data.number }</td><td>${data.name }</td></tr></c:forEach></table><button type="button" class="btn btn-primary" id="add">新增</button><button type="button" class="btn btn-primary" id="update">修改</button><button type="button" class="btn btn-danger" id="delete">删除</button>
</div>
</body>
</html>

update.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head><title>部门修改</title><style>#container {width: 600px;margin: 10px auto;}#container form .align {margin: 8px 0;}</style>
</head>
<body>
<div id="container"><form action="update"><input type="hidden" name="id" value="${dep.id}"><div class="align"><label>编号</label><input type="text" placeholder="请输入编号" name="number"value="${dep.number}"></div><div class="align"><label>名称</label><input type="text" placeholder="请输入名称"name="name" value="${dep.name}"></div><div class="align"><button type="submit">保存</button></div></form>
</div>
</body>
</html>