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SSM架构（二）

作者：一键难忘520 | 2024-07-16 06:23:13

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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：

  1.     List<Emp> search(Emp condition);
  2.     Emp searchById(Integer id);
  3.     boolean add(Emp emp);
  4.     boolean update(Emp emp);
  5.     boolean delete(Integer id);

EmployeeServiceImpl实现类代码：  

  1. @Service
  2. public class EmpServiceImpl implements EmpService {
  3.     @Autowired
  4.     EmpDao empDao;
  5.     @Override
  6.     public List<Emp> search(Emp condition) {
  7.         List<Emp> list = empDao.search(condition);
  8.         return list;
  9.     }
  10.     @Override
  11.     public Emp searchById(Integer id) {
  12.         Emp emp = empDao.searchById(id);
  13.         return emp;
  14.     }
  15.     @Override
  16.     public boolean add(Emp emp) {
  17.         int rs = empDao.add(emp);
  18.         return rs > 0;
  19.     }
  20.     @Override
  21.     public boolean update(Emp emp) {
  22.         int rs = empDao.update(emp);
  23.         return rs > 0;
  24.     }
  25.     @Override
  26.     public boolean delete(Integer id) {
  27.         int rs = empDao.delete(id);
  28.         return rs > 0;
  29.     }
  30. }
DepartmentService 接口代码： 
  1.     public List<Dep> search();
  2.     public Dep searchById(Integer id);
  3.     public boolean add(Dep dep);
  4.     public boolean update(Dep dep);
  5.     public boolean delete(Integer id);
DepartmentServiceImpl 实现类代码： 
  1. @Service
  2. public class DepServiceImpl implements DepService {
  3.     @Autowired
  4.     DepDao depDao;
  5.     @Autowired
  6.     EmpDao empDao;
  7.     @Override
  8.  
  9.     public List<Dep> search() {
  10.         List<Dep> list = depDao.search();
  11.         return list;
  12.     }
  13.     @Override
  14.     public Dep searchById(Integer id) {
  15.         Dep dep = depDao.searchById(id);
  16.         return dep;
  17.     }
  18.     @Override
  19.     public boolean add(Dep dep) {
  20.         int rs = depDao.add(dep);
  21.         return rs > 0;
  22.     }
  23.     @Override
  24.     public boolean update(Dep dep) {
  25.         int rs = depDao.update(dep);
  26.         return rs > 0;
  27.     }
  28.     @Override
  29.     public boolean delete(Integer id) {
  30.         int rs = depDao.delete(id);
  31.         rs = empDao.updateByDep(id);
  32.         return rs > 0;
  33.     }
  34. }

 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：

  1. @Controller
  2. @RequestMapping("emp")
  3. public class EmpController {
  4.     @Autowired
  5.     EmpService empService;
  6.     @Autowired
  7.     DepService depService;
  8.     @RequestMapping("search")
  9.     public ModelAndView search(Emp condition) {
  10.         ModelAndView mv = new ModelAndView("emp/show");
  11.         List<Emp> list = empService.search(condition);
  12.         List<Dep> depList=depService.search();
  13.         mv.addObject("list", list);
  14.         mv.addObject("depList",depList);
  15.         mv.addObject("c", condition);
  16.         return mv;
  17.     }
  18.     @RequestMapping("showAdd")
  19.     public ModelAndView showAdd() {
  20.         ModelAndView mv = new ModelAndView("emp/add");
  21.         List<Dep> depList = depService.search();
  22.         mv.addObject("depList", depList);
  23.         return mv;
  24.     }
  25.     @RequestMapping("add")
  26.     public String add(Emp emp) {
  27.         boolean flag = empService.add(emp);
  28.         return "redirect:search";
  29.     }
  30.     @RequestMapping("showUpdate")
  31.     public ModelAndView showUpdate(Integer id) {
  32.         Emp emp = empService.searchById(id);
  33.         List<Dep> depList = depService.search();
  34.         ModelAndView mv = new ModelAndView("emp/update");
  35.         mv.addObject("emp", emp);
  36.         mv.addObject("depList", depList);
  37.         return mv;
  38.     }
  39.     @RequestMapping(value="update")
  40.     public String update(Emp emp) {
  41.         boolean flag = empService.update(emp);
  42.         return "redirect:search";
  43.     }
  44.     @RequestMapping("delete")
  45.     public String delete(Integer id) {
  46.         boolean flag = empService.delete(id);
  47.         return "redirect:search";
  48.     }
  49. }
DepartmentController 实现代码： 
  1. @Controller
  2. @RequestMapping("dep")
  3. public class DepController {
  4.     @Autowired
  5.     DepService depService;
  6.     @RequestMapping("search")
  7.     public ModelAndView search() {
  8.         ModelAndView mv = new ModelAndView("dep/show");
  9.         List<Dep> list = depService.search();
  10.         mv.addObject("list", list);
  11.         return mv;
  12.     }
  13.     @RequestMapping("showAdd")
  14.     public String showAdd() {
  15.         return "dep/add";
  16.     }
  17.     @RequestMapping("add")
  18.     public String add(Dep dep) {
  19.         boolean flag = depService.add(dep);
  20.         return "redirect:search";
  21.     }
  22.     @RequestMapping("showUpdate")
  23.     public ModelAndView showUpdat(Integer id) {
  24.         ModelAndView mv = new ModelAndView("dep/update");
  25.         Dep dep = depService.searchById(id);
  26.         mv.addObject("dep", dep);
  27.         return mv;
  28.     }
  29.     @RequestMapping("update")
  30.     public String update(Dep dep) {
  31.         boolean flag = depService.update(dep);
  32.         return "redirect:search";
  33.     }
  34.     @RequestMapping("delete")
  35.     public String delete(Integer id) {
  36.         boolean flag = depService.delete(id);
  37.         return "redirect:search";
  38.     }
  39. }

2.6 JSP(View层)

2.6.1 emp

add.jsp

  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.          pageEncoding="utf-8" %>
  3. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  4. <html>
  5. <head>
  6.     <title></title>
  7.     <style>
  8.         #container {
  9.             width: 700px;
  10.             margin: 10px auto;
  11.         }
  12.         #container form .align {
  13.             margin: 8px 0;
  14.         }
  15.     </style>
  16. </head>
  17. <body>
  18. <div id="container">
  19.     <form action="add">
  20.         <div class="align">
  21.             <label>编号</label>
  22.             <input type="text" placeholder="请输入编号"
  23.                    name="number">
  24.         </div>
  25.         <div class="align">
  26.             <label>名字</label>
  27.             <input type="text" placeholder="请输入名字" name="name">
  28.         </div>
  29.         <div class="align">
  30.             <label>性别</label>
  31.             <input type="radio" value="男" name="gender"/>男
  32.             <input type="radio" value="女" name="gender"/>女
  33.         </div>
  34.         <div class="align">
  35.             <label>年龄</label>
  36.             <input type="text" placeholder="请输入年龄" name="age">
  37.         </div>
  38.         <div class="align">
  39.             <label>部门</label>
  40.             <select name="dep.id">
  41.                 <c:forEach var="dep" items="${depList }">
  42.                     <option value="${dep.id }">${dep.name }</option>
  43.                 </c:forEach>
  44.             </select>
  45.         </div>
  46.         <div class="align">
  47.             <button type="submit">保存</button>
  48.         </div>
  49.     </form>
  50. </div>
  51. </body>
  52. </html>
show.jsp 
  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.          pageEncoding="utf-8" %>
  3. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  4. <html>
  5. <head>
  6.     <title>员工展示</title>
  7.     <style>
  8.         #container {
  9.             width: 700px;
  10.             margin: 10px auto;
  11.         }
  12.         #container #search{
  13.             overflow: hidden;
  14.         }
  15.         #container #search .align{
  16.             float:left;
  17.             margin-right:8px;
  18.         }
  19.         #container #search input{
  20.             width:160px;
  21.         }
  22.         #container #data {
  23.             clear: both;
  24.             width: 700px;
  25.             margin:10px 0;
  26.         }
  27.     </style>
  28. </head>
  29. <body>
  30. <div id="container">
  31.     <form id="search" action="search" method="post">
  32.         <div class="align">
  33.             <input type="text" name="number"
  34.                    placeholder="编号" value=${c.number}>
  35.         </div>
  36.         <div class="align">
  37.             <input type="text" name="name"
  38.                    placeholder="姓名" value=${c.name}>
  39.         </div>
  40.         <div class="align">
  41.             <select name="gender">
  42.                 <option value="">性别</option>
  43.                 <option value="男" <c:if test="${c.gender =='男'}">
  44.                     selected</c:if>>男</option>
  45.                 <option value="女" <c:if test="${c.gender =='女'}">
  46.                     selected</c:if>>女</option>
  47.             </select>
  48.         </div>
  49.         <div class="align">
  50.             <input type="text" name="age" placeholder="年龄"
  51.                    value=${c.age!=null?c.age:''}>
  52.         </div>
  53.         <div class="align">
  54.             <select name="dep.id">
  55.                 <option value="">部门</option>
  56.                 <c:forEach items="${depList}" var="dep">
  57.                     <option value="${dep.id }"
  58.                             <c:if test="${dep.id ==c.dep.id}">
  59.                                 selected</c:if>>${dep.name }</option>
  60.                 </c:forEach>
  61.             </select>
  62.         </div>
  63.         <div class="align">
  64.             <button type="submit">搜索</button>
  65.         </div>
  66.     </form>
  67.     <table id="data" border="1" >
  68.         <tr>
  69.             <th>编号</th>
  70.             <th>名字</th>
  71.             <th>性别</th>
  72.             <th>年龄</th>
  73.             <th>部门</th>
  74.         </tr>
  75.         <c:forEach items="${list}" var="data">
  76.             <tr>
  77.                 <td>${data.number }</td>
  78.                 <td>${data.name }</td>
  79.                 <td>${data.gender }</td>
  80.                 <td>${data.age }</td>
  81.                 <td>${data.dep.name }</td>
  82.             </tr>
  83.         </c:forEach>
  84.     </table>
  85.     <button type="button" id="add">新增</button>
  86.     <button type="button" id="update">修改</button>
  87.     <button type="button" id="delete">删除</button>
  88. </div>
  89. </body>
  90. </html>
update.jsp 
  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.          pageEncoding="utf-8" %>
  3. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  4. <html>
  5. <head>
  6.     <title>修改员工</title>
  7.     <style>
  8.         #container {
  9.             width: 700px;
  10.             margin: 10px auto;
  11.         }
  12.         #container form .align{
  13.             margin:8px 0;
  14.         }
  15.     </style>
  16. </head>
  17. <body>
  18. <div id="container">
  19.     <form action="update">
  20.         <input type="hidden" name="id" value="${emp.id}">
  21.         <div class="align">
  22.             <label>编号</label>
  23.             <input type="text" placeholder="请输入编号"
  24.                    name="number" value="${emp.number}">
  25.         </div>
  26.         <div class="align">
  27.             <label>名字</label>
  28.             <input type="text" placeholder="请输入名字"
  29.                    name="name" value="${emp.name}">
  30.         </div>
  31.         <div class="align">
  32.             <label>性别</label>
  33.             <input type="radio" value="男" name="gender"
  34.                    <c:if test="${emp.gender=='男'}">checked</c:if> />男
  35.             <input type="radio" value="女" name="gender"
  36.                    <c:if test="${emp.gender=='女'}">checked</c:if> />女
  37.         </div>
  38.         <div class="align">
  39.             <label>年龄</label>
  40.             <input type="text" placeholder="请输入年龄" name="age"
  41.                    value="${emp.age}">
  42.         </div>
  43.         <div class="align">
  44.             <label>部门</label>
  45.             <select name="dep.id">
  46.                 <c:forEach var="dep" items="${depList }">
  47.                     2.6.2 dep
  48.                     add.jsp
  49.                     <option value="${dep.id }"
  50.                             <c:if test="${emp.dep.id==dep.id}">
  51.                                 selected</c:if> >${dep.name }</option>
  52.                 </c:forEach>
  53.             </select>
  54.         </div>
  55.         <div class="align">
  56.             <button type="submit">保存</button>
  57.         </div>
  58.     </form>
  59. </div>
  60. </body>
  61. </html>
2.6.2 dep
add.jsp 
  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.          pageEncoding="utf-8" %>
  3. <html>
  4. <head>
  5.     <title>部门新增</title>
  6.     <style>
  7.         #container {
  8.             width: 400px;
  9.             margin: 10px auto;
  10.         }
  11.         #container form .align {
  12.             margin: 8px 0;
  13.         }
  14.     </style>
  15. </head>
  16. <body>
  17. <div id="container">
  18.     <form action="add">
  19.         <div class="align">
  20.             <label>编号</label>
  21.             <input type="text" placeholder="请输入编号" name="number">
  22.         </div>
  23.         <div class="align">
  24.             <label>名称</label>
  25.             <input type="text" placeholder="请输入名称" name="name">
  26.         </div>
  27.         <div class="align">
  28.             <button type="submit">保存</button>
  29.         </div>
  30.     </form>
  31. </div>
  32. </body>
  33. </html>
show.jsp 
  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.          pageEncoding="utf-8" %>
  3. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  4. <html>
  5. <head>
  6.     <title>部门展示</title>
  7.     <style>
  8.         #container {
  9.             width: 400px;
  10.             margin: 10px auto;
  11.         }
  12.         #container #data {
  13.             clear: both;
  14.             width: 400px;
  15.             margin: 10px 0;
  16.         }
  17.     </style>
  18. </head>
  19. <body>
  20. <div id="container">
  21.     <table id="data" border="1px">
  22.         <tr>
  23.             <th>编号</th>
  24.             <th>名称</th>
  25.         </tr>
  26.         <c:forEach items="${list}" var="data">
  27.             <tr>
  28.                 <td>${data.number }</td>
  29.                 <td>${data.name }</td>
  30.             </tr>
  31.         </c:forEach>
  32.     </table>
  33.     <button type="button" class="btn btn-primary" id="add">新增</button>
  34.     <button type="button" class="btn btn-primary" id="update">修改</button>
  35.     <button type="button" class="btn btn-danger" id="delete">删除</button>
  36. </div>
  37. </body>
  38. </html>
update.jsp 
  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.          pageEncoding="utf-8" %>
  3. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  4. <html>
  5. <head>
  6.     <title>部门修改</title>
  7.     <style>
  8.         #container {
  9.             width: 600px;
  10.             margin: 10px auto;
  11.         }
  12.             #container form .align {
  13.                 margin: 8px 0;
  14.             }
  15.     </style>
  16. </head>
  17. <body>
  18. <div id="container">
  19.     <form action="update">
  20.         <input type="hidden" name="id" value="${dep.id}">
  21.         <div class="align">
  22.             <label>编号</label>
  23.             <input type="text" placeholder="请输入编号" name="number"
  24.                    value="${dep.number}">
  25.         </div>
  26.         <div class="align">
  27.             <label>名称</label>
  28.             <input type="text" placeholder="请输入名称"
  29.                    name="name" value="${dep.name}">
  30.         </div>
  31.         <div class="align">
  32.             <button type="submit">保存</button>
  33.         </div>
  34.     </form>
  35. </div>
  36. </body>
  37. </html>
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