1.异常处理
（1）创建自定义异常类
package net.dfrz.exception;
public class MyException extends Exception {
private String message;
public MyException(String message) {
this.message = message;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
（2）在struts.xml中配置全局异常
<global-results>
<result name="myexc">/exception.jsp</result>
</global-results>
<global-exception-mappings>
<exception-mapping result="myexc" exception="
net.dfrz.exception.MyException"></exception-mapping>
</global-exception-mappings>
（3）创建测试类
package net.dfrz.action;
import net.dfrz.exception.MyException;
public class Hello2Action
{
public String hello2() throws MyException
{
System.out.println("message 2:"+message);
try
{
int i = 10/0;
}
catch(Exception e)
{
throw new MyException("除0异常");
}
return "success";
}
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
（4）捕获异常信息
<body>
我是exception
<hr/>
${exception.message}
</body>
2.返回json数据类型
（1）jar包更新
（2）修改struts.xml配置（继承json-default）
<package name="javastruts" extends="json-default">
（3）测试代码
@Actions({
@Action(value="/findPersonById",results={
@Result(name="success",location="/person.jsp")
}),
@Action(value="/findPersonById2json",results={
//params={"root","person","excludeNullProperties","true"})
//json格式 只有person对象的数据 不包含空字符
@Result(type="json",
params= {"ignoreHirearchy","false","includeProperties",
"person.*,pageNO,pageSize","excludeNullProperties","true"})
// ignoreHirearchy-false表示可过滤继承 includeProperties包含
})
})
public String findPersonById(){
person = new Person();
person.setAge(11);
person.setName("sda");
person.setBirthday(new Date());
return "success";
}
@Actions({
@Action(value="/findPersonById4json",results={
@Result(type="json",params={"includeProperties",
"lists\\[\\d+\\]\\.\\w+,pageNO,pageSize"})
//返回列表 \d数字 \w字母
})
})
public String findPersons(){
lists = new ArrayList<Person>();
person = new Person();
person.setAge(11);
person.setName("sda");
person.setBirthday(new Date());
lists.add(person);
person = new Person();
person.setAge(22);
person.setName("222");
person.setBirthday(new Date());
lists.add(person);
person = new Person();
person.setAge(33);
person.setName("333");
person.setBirthday(new Date());
lists.add(person);
return "success";
}
（4）相关类
public class Person implements Serializable{
private static final long serialVersionUID = 1501197896931045497L;
private String name;
private int age;
private Date birthday;
@JSON(format="yyyy:MM:dd")
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
//
public class CommonAction extends ActionSupport{
protected int pageNO;
protected int pageSize;
public int getPageNO() {
return pageNO;
}
public void setPageNO(int pageNO) {
this.pageNO = pageNO;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
}