异常处理器
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="defaultErrorView" value="error"></property>
<property name="exceptionAttribute" value="ex"></property>
</bean>
这里是在spring的xml文件中写 ， 之中使用了视图解析器，error是错误跳转的页面，
<property name="defaultErrorView" value="error"></property>
<property name="exceptionAttribute" value="ex"></property>
这个是异常的对象，el表达式 ，页面使用输出异常对象
2 自定义异常处理
<body>
<h2>登录</h2>
<form action="/lp" method="post">
用户名： <input name="username" value="${username}"/>
年龄： <input name="age"/>
出生日期： <input name="birthday"/>
<input type="submit" value="登录"/>
</form>
</body>
@RequestMapping("/login")
public String log(String username,int age) throws Exception {
System.out.println("adadadda");
if(!username.equals("admin")){
System.out.println("aaa");
throw new NameException("名字错了");
}
if(age>60){
System.out.println("bbb");
throw new AgeException("年龄错了");
}
return "ax";
}
下面把异常类说一下
public class AgeException extends Exception{
public AgeException() {
}
public AgeException(String message) {
super(message);
}
}
public class NameException extends Exception {
public NameException() {
}
public NameException(String message) {
super(message);
}
}
这是我们自己的异常
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<!--<property name="defaultErrorView" value="error"></property>-->
<property name="exceptionAttribute" value="ex"></property>
<property name="exceptionMappings">
<props>
<prop key="springmmv.exception.NameException">age</prop>
<prop key="springmmv.exception.AgeException">name</prop>
</props>
</property>
</bean>
把异常跳转的页面定义好就行
自定义异常处理器
*/
public class text implements HandlerExceptionResolver {
public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
ModelAndView mv=new ModelAndView();
mv.addObject("ex",e);
if(e instanceof NameException){
mv.setViewName("name");
}
if(e instanceof AgeException){
mv.setViewName("age");
}
return mv;
}
}
之后在spring中加入一行这个的配置文件就行，就是以他为class的bean
类型转换
Data 的各种处理
<bean id="dg" class="springmmv.cn.news.Conver"></bean> 为转换器的类
<bean id="dg" class="springmmv.cn.news.Conver"></bean>
<bean id="jk" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters" ref="dg"></property>
</bean>
<mvc:annotation-driven conversion-service="jk"/>
public class Conver implements Converter<String,Date> {
public Date convert(String str) {
SimpleDateFormat sa=gets(str);
try {
Date date=sa.parse(str);
return date;
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
public SimpleDateFormat gets(String string){
SimpleDateFormat sm=new SimpleDateFormat("yyyy年MM月dd日");
if(Pattern.matches("^\d{4}-\d{2}-\d{2}",string)){
sm=new SimpleDateFormat("yyyy-MM-dd");
}else if(Pattern.matches("^\d{4}/\d{2}/\d{2}",string)){
sm=new SimpleDateFormat("yyyy/MM/dd");
}else if(Pattern.matches("^\d{4}\d{2}\d{2}",string)){
sm=new SimpleDateFormat("yyyyMMdd");
}
return sm;
}