7.26--SSH学习之SpringMVC控制器注释

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第一类

配置文件：

<!-- 指定自动扫描com.su.controller包下的控制器类 -->    <context:component-scan base-package="com.su.controller"></context:component-scan>    <!-- 自动加载注解适配器和映射器 -->    <mvc:annotation-driven></mvc:annotation-driven>    <!--  视图解析器 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <!--  配置jsp路径的前缀        <property name="prefix" value="/result/" />-->        <!--  配置jsp路径的后缀        <property name="suffix" value=".jsp" />-->    </bean>

控制器类：包含三种方法

@Controller   //此注释代表本类是控制器//@RequestMapping(name="stu")  //相当于action中的namespace，即访问时加的前缀public class StudentController {    @RequestMapping("addstu.action")    public ModelAndView addStudent() throws Exception{        System.out.println("in StudentController method addStudent()");        ModelAndView mav = new ModelAndView();        mav.addObject("stuName", "大海");        //转发//      mav.setViewName("stusuccess.jsp");        //重定向        mav.setViewName("redirect:stusuccess.jsp");        return mav;         }    @RequestMapping("updatestu.action")    public String updateStudent() throws Exception{        System.out.println("in StudentController method updateStudent()");        //转发        return "stusuccess.jsp";        //重定向//      return "redirect:stusuccess";    }    @RequestMapping("deletestu.action")    public void deleteStudent(HttpServletRequest request,HttpServletResponse response) throws Exception{        System.out.println("in StudentController method deleteStudent()");        request.getSession().setAttribute("stuName", "小倩");        //转发//      request.getRequestDispatcher("stusuccess.jsp").forward(request, response);        //重定向        response.sendRedirect("stusuccess.jsp");    }}

提交表单访问控制器：

  <body>    <form action="addstu.action" method="post">        学生名：<input type="text" name="stuName" value="轩辕"><br>        密码：<input type="password" name="stuPwd" value="1111"><br>        <input type="submit" value="新增">    </form>  </body>

第二类

在控制器类获取通过表单提交属性的值，有三种方式：

1. 直接在方法上传参

@RequestMapping("addstu.action")    public ModelAndView addStudent(String stuName,String stuPwd,String gender,String city,String personInfo,String[] hobby,Double height) throws Exception{        System.out.println("in StudentController method addStudent()");        System.out.println(stuName);        System.out.println(stuPwd);        System.out.println(gender);        System.out.println(city);        System.out.println(personInfo);        for(String s : hobby){            System.out.println(s);        }        System.out.println(height);        ModelAndView mav = new ModelAndView();        mav.addObject("stuName", stuName);        //转发        mav.setViewName("stusuccess.jsp");        //重定向//      mav.setViewName("redirect:stusuccess.jsp");        return mav;         }

2. 在方法上传对象

    @RequestMapping("updatestu.action")    public String updateStudent(Student stu,Classes classes,HttpSession session) throws Exception{        System.out.println("in StudentController method updateStudent()");        System.out.println(stu.getStuName());        System.out.println(stu.getCity());        System.out.println(stu.getGender());        System.out.println(stu.getPersonInfo());        System.out.println(stu.getStuPwd());        System.out.println(stu.getHeight());        for(String s : stu.getHobby()){            System.out.println(s);        }        System.out.println(classes.getClassesId());        System.out.println(classes.getClassesName());        session.setAttribute("stu", stu);        //转发//      return "stusuccess.jsp";        //重定向        return "redirect:stusuccess.jsp";           }

3. 在方法上传对象（此对象包含两个子类）

@RequestMapping("deletestu.action")    public void deleteStudent(HttpServletRequest request,HttpServletResponse response,GenericClass gc) throws Exception{        System.out.println("in StudentController method deleteStudent()");        request.getSession().setAttribute("stuName", "小倩");        System.out.println(gc.getStudent().getStuName());        //获取Classes类的属性        System.out.println(gc.getClasses().getClassesId());        //获取Student类中Classes类对象的属性        System.out.println(gc.getStudent().getClasses().getClassesName());        //转发        request.getRequestDispatcher("stusuccess.jsp").forward(request, response);        //重定向//      response.sendRedirect("stusuccess.jsp");    }

4. 前两种方法使用下面的表单，注：属性名上不写对象名

<body>    <form action="updatestu.action" method="post">        学生名：<input type="text" name="stuName" value="轩辕"><br>        密码：<input type="password" name="stuPwd" value="1111"><br>        性别：<input type="radio" name="gender" value="男">男&nbsp;            <input type="radio" name="gender" value="女">女&nbsp;<br>        所在城市：<select name="city" id="city">                    <option value="郑州">郑州</option>                    <option value="开封">开封</option>                    <option value="洛阳">洛阳</option>                </select><br>        个人说明：<textarea rows="6" cols="40" name="personInfo" id="personInfo"></textarea><br>        爱好：<input type="checkbox" name="hobby" value="电影">电影&nbsp;        <input type="checkbox" name="hobby" value="音乐">音乐&nbsp;        <input type="checkbox" name="hobby" value="吃">吃&nbsp;        <input type="checkbox" name="hobby" value="睡">睡&nbsp;        <input type="checkbox" name="hobby" value="摄影">摄影&nbsp;<br>        身高：<input type="text" name="height" id="height">cm<br>        所在班级：<select name="classesId" id="classesId">                    <option value="1">一班</option>                    <option value="2">二班</option>                    <option value="3">三班</option>                </select><br>        班级名：<input type="text" name="classesName" >        <input type="submit" value="新增">    </form>  </body>

5. 第三种方法使用下面的表单，注：属性名上写对象名，另外一个类中包含另一类的对象时，要获取此属性的值时，需要为属性写，第一级类.第二级类.属性名

 <body>    <form action="deletestu.action" method="post">        学生名：<input type="text" name="student.stuName" value="轩辕"><br>        密码：<input type="password" name="student.stuPwd" value="1111"><br>        性别：<input type="radio" name="student.gender" value="男">男&nbsp;            <input type="radio" name="student.gender" value="女">女&nbsp;<br>        所在城市：<select name="student.city" id="city">                    <option value="郑州">郑州</option>                    <option value="开封">开封</option>                    <option value="洛阳">洛阳</option>                </select><br>        个人说明：<textarea rows="6" cols="40" name="student.personInfo" id="personInfo"></textarea><br>        爱好：<input type="checkbox" name="student.hobby" value="电影">电影&nbsp;        <input type="checkbox" name="student.hobby" value="音乐">音乐&nbsp;        <input type="checkbox" name="student.hobby" value="吃">吃&nbsp;        <input type="checkbox" name="student.hobby" value="睡">睡&nbsp;        <input type="checkbox" name="student.hobby" value="摄影">摄影&nbsp;<br>        身高：<input type="text" name="student.height" id="height">cm<br>        所在班级：<select name="classes.classesId" id="classesId">                    <option value="1">一班</option>                    <option value="2">二班</option>                    <option value="3">三班</option>                </select><br>        班级名：<input type="text" name="student.classes.classesName" >        <input type="submit" value="新增">    </form>  </body>

Author:su1573

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