1.自定义局部异常:
2.自定义全局异常:
3.异常执行的优先级
>>当同时出现全局和局部异常时,局部异常优先,即局部异常优先于全局异常执行,如果全局和局部异常相同,那么将以局部异常为准.
>>当异常出现父子关系时,子异常优先.如java.lang.ArithmeticException是java.lang.Exception的子类.如果同时进行配置的话,那么以java.lang.ArithmeticException为准.
如:
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/WEB-INF/success.
jsp
/WEB-INF/sonException.jsp
/WEB-INF/fatherException.jsp
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二.struts2中的类型转换
1、内置类型转换器
HTTP没有类型的概念,只能将表单的参数,以String或String[]的方式接收.
>>1).struts2提供了内置的类型转换器,它能将string类型和8种基本类型自动转换.
>>2).struts2的内置类型转换器,能将java.util.Date与String类型自动转换,但Date类型的字符串格式必须为yyyy-MM-dd的格式;同时struts2会自动检测日期的合法性,如01-33这种就不能通过.
>>3).内置转换器,不能将String类型转换成任意javaBean类型,这里需要使用自定义转换器.
下面以实例来演示:
Address.java
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package type;
/**
* @ClassName: Address
* @Description: 定义一个address model
* @author: amosli
* @email:amosli@infomorrow.com
* @date Jan 26, 2014 1:53:33 AM
*/
public class Address {
private String province;// 省份
private String city;// 城市
private String area;// 区域
public String getProvince() {
return province;
}
public void setProvince(String province) {
this.province = province;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getArea() {
return area;
}
public void setArea(String area) {
this.area = area;
}
}
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TypeAction.java
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package type;
import java.util.Date;
import com.opensymphony.xwork2.ActionSupport;
/**
* @ClassName: TypeAction
* @Description: 本类主要是讲解类型转换
* @author: amosli
* @email:amosli@infomorrow.com
* @date Jan 26, 2014 1:00:35 AM
*/
public class TypeAction extends ActionSupport{
private static final long serialVersionUID = -2558635842755603468L;
private String username;//姓名
private Integer age;//年龄
private Float salary;//薪水
private Date birthday;//生日
private Address address;//地址
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Integer getAge() {
return age;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public void setAge(Integer age) {
this.age = age;
}
public Float getSalary() {
return salary;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public void setSalary(Float salary) {
this.salary = salary;
}
public String execute() throws Exception {
return SUCCESS;
}
}
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type_struts.xml
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< xml version="1.0" encoding="UTF-8" >