引 jar 包
aopalliance.jar
aspectjweaver.jar
commons-logging-1.2.jar
spring-aop-3.2.16.RELEASE.jar
spring-beans-3.2.16.RELEASE.jar
spring-context-3.2.16.RELEASE.jar
spring-core-3.2.16.RELEASE.jar
spring-expression-3.2.16.RELEASE.jar
spring-web-3.2.16.RELEASE.jar
spring-webmvc-3.2.16.RELEASE.jar
在web中配备依赖
//解决中文乱码问题
<filter>
<filter-name>filterinto</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>filterinto</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-servlet1.xml</param-value>
</init-param>
//启动级别数字越小级别越大
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
配备资源文件springmvc-servlet1.xml
springmvc-servlet1.xml里面的文件内容
<?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:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
//扫描com.bdqn.chontroller层
<context:component-scan base-package="com.bdqn.chontroller"></context:component-scan>
//逻辑视图解析器
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp" />
</bean>
//拦截器
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/*"/>
<mvc:exclude-mapping path="/login"/>
<bean class="com.bdqn.util.loginfilter"></bean>
</mvc:interceptor>
</mvc:interceptors>
</beans>
前后台交互
前台
login页面
index页面
后台
后台向前台传值的方式
1.使用map向页面传值
@Controller
public class UserController {
@RequestMapping("/demo1")
public String getdemo1(Map<String, Object> map){
map.put("n","list数据");
return "index";
}
通过request 传值
@RequestMapping("/demo2")
public String getdemo2(HttpServletRequest request){
List<User> users=new ArrayList<User>();
for(int i=0;i<=10;i++){
User user = new User();
user.setName("n:"+i);
user.setPassword("p:"+i);
users.add(user);
}
request.setAttribute("l", users);
return "index";
}
2.使用model 向页面传值
@RequestMapping("/demo3")
public String getdemo3(Model request){
List<User> users=new ArrayList<User>();
for(int i=0;i<=10;i++){
User user = new User();
user.setName("n:"+i);
user.setPassword("p:"+i);
users.add(user);
}
request.addAttribute("l", users);
return "index";
}
前台jstl表达式
<s:forEach items="${list}" var="t">
${t.id} ${t.name} <br />
</s:forEach>
3第三种通过modelandview传值
@RequestMapping("/demo4")
public ModelAndView getdemo4(HttpSession session,String b){
List<User> users=new ArrayList<User>();
for(int i=0;i<=10;i++){
User user = new User();
user.setName("n:"+i);
user.setPassword("p:"+i);
users.add(user);
}
System.out.println(b);
session.setAttribute("s", "中文");
ModelAndView a=new ModelAndView();
a.setViewName("index");
a.addObject("l",users);
return a;
}
使用spring mvc拦截器
1.配置拦截器规则指向自定义的类
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/book/*"/>
<!-- 定义在mvc:interceptor下面的表示是对特定的请求才进行拦截的 -->
<bean class="com.bdqn.filter.loginfilter"/>
</mvc:interceptor>
</mvc:interceptors>
2.定义loginfilter类实现接口HandlerInterceptor。并实现三个方法
3session的值为登录后添加
spring mvc集成了jsp的内置对象我们可以直接使用。如上图所示。
spring MVC异常处理机制
3.1全局异常处理
1.在配置文件中配置全局异常信息
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="exceptionMappings">
<props>
<prop key="java.lang.RuntimeException">error</prop>
</props>
</property>
</bean>
2.模拟一个异常信息如:
int j=new Integer("sss");
3.error通过试图解析找到视图
<!-- 全局异常 -->
${exception.message}