1.在src中不同package中定义两个类LoginAction
jk包中：
public class LoginAction extends ActionSupport{
private final String success = "success";
private final String error = "error";
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String execute()
{
if(getUsername().equals("jk") &&
getPassword().endsWith("123"))
{
ActionContext.getContext().getSession().put("user", getUsername());
return success;
}
else
{
return error;
}
}
}
org.apache.struts.actionresult包：
public class LoginAction {
private String username;
private String password;
private String tip;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getTip() {
return tip;
}
public void setTip(String tip) {
this.tip = tip;
}
public String execute() throws Exception
{
if(getUsername().equalsIgnoreCase("my"))
{
throw new MyException("自定义异常");
}
if(getUsername().equalsIgnoreCase("lang"))
{
throw new java.lang.Exception("用户名不能为lang");
}
if(getUsername().equals("jk"))
{
setTip("登录成功");
return "success";
}
else{
return "error";
}
}
}
MyExeption
public class MyException extends Exception {
public MyException()
{}
public MyException(String msg)
{
super(msg);
}
}
第一个类是普通登录类，第二个用来测试struts2的异常处理！
2.struts.xml中配置方式：
<package name="jk" extends="struts-default"> <action name="login" class="jk.LoginAction"> <result type="redirect">/success.jsp</result> </action> </package> <package name="org.apache.struts.actionresult" extends="struts-default" namespace="/exception"> <global-results> <result name="lang">/lang.jsp</result> </global-results> <global-exception-mappings> <exception-mapping result="lang" exception="java.lang.Exception"> </exception-mapping> </global-exception-mappings> <action name="exception/login" class="org.apache.struts.actionresult.LoginAction"> <exception-mapping result="my" exception="org.apache.struts.actionresult.MyException" /> <result name="my">/my.jsp</result> </action> </package>
3.jsp中代码：
<s:form action="login"> <s:textfield name="username" key="user"/> <s:textfield name="password" key="pass"/> <s:submit key="login"/> </s:form> <s:form action="login" namespace="/exception"> <s:textfield name="username" key="user"/> <s:textfield name="password" key="pass"/> <s:submit key="login"/> </s:form>
即可用使用命名空间来区别两个action中的login。
但是在测试中发现一个问题：
No configuration found for the specified action: 'exception/login' in namespace....
也就是说在命名空间中找不到exception/login这个action
只需要把JSP中写成这样就可以了：<s:form action="login" namespace="/exception">！