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springmvc是spring的亲儿子,属于web层框架,提供了MVC(模型 - 视图 - 控制器)架构和用于开发灵活和松散耦合的Web应用程序的组件。
Springmvc框架理解
Springmvc实现原理与详解
Springmvc简介
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 使用扫描注解的包,包括子集 -->
<context:component-scan base-package="controller"/>
<!-- 视图解析器 -->
<!--将视图逻辑 名解析为: /WEB-INF/jsp/<viewName>.jsp -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
@Controller
@RequestMapping("/bj")
public class BjController {
BjDao bjDao = new BjDao();
@RequestMapping("/list")
public String list(Model model) {
try {
List<Bj> bjList = bjDao.queryAll();
model.addAttribute("bjList", bjList);
return "bj/list";
} catch (Exception e) {
e.printStackTrace();
return "error";
}
}
@RequestMapping("/preadd")
public String preadd() {
return "bj/add";
}
@RequestMapping("/add")
public String add(Bj bj, Model model) {
try {
bjDao.add(bj);
model.addAttribute("info", "添加成功");
return "bj/add";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/edit")
public String edit(int id, Model model) {
try {
Bj bj = bjDao.findBjById(id);
model.addAttribute("bj", bj);
return "bj/edit";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/update")
public String update(Bj bj, Model model) {
try {
bjDao.update(bj);
model.addAttribute("info", "修改成功");
return "bj/edit";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/delete/{id}")
public String delete(@PathVariable(value = "id") int id, Model model, HttpServletResponse response) {
response.setContentType("text/html;charset=UTF-8");
try {
PrintWriter out = response.getWriter();
if (bjDao.kongbj(id) != 0) {
out.print("该班级还有学生,不能删除");
return null;
} else {
bjDao.delete(id);
return "redirect:/bj/list.do";
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
}
@Controller
@RequestMapping("/student")
public class StudentController {
StudentDao studentDao = new StudentDao();
BjDao bjDao = new BjDao();
@RequestMapping("/list")
public String list(Model model) {
try {
List<Student> studentList = studentDao.queryAll();
model.addAttribute("studentList", studentList);
return "student/list";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/preadd")
public String preadd(Model model) {
try {
List<Bj> bjList=bjDao.queryAll();
model.addAttribute("bjList", bjList);
return "student/add";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/add")
public String add(Model model, Student student, int bjid) {
try {
// System.out.println(student.getSname());
// System.out.println(bjid);
student.setBj(new Bj(bjid));
studentDao.add(student);
model.addAttribute("info", "添加成功");
return this.preadd(model);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/edit")
public String edit(int id, Model model) {
try {
Student student = studentDao.findStudentById(id);
model.addAttribute("student", student);
List<Bj> bjList=bjDao.queryAll();
model.addAttribute("bjList", bjList);
return "student/edit";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/update")
public String update(int id, String sno, String sname, String sex, int bjid, Model model) {
try {
Student student = new Student();
student.setId(id);
student.setSno(sno);
student.setSname(sname);
student.setSex(sex);
student.setBj(new Bj(bjid));
studentDao.update(student);
model.addAttribute("info", "修改成功");
return this.edit(id, model);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/delete")
public String delete(int id) {
try {
studentDao.delete(id);
return "redirect:/student/list.do";
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
}
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