1.Struts2的Action接收参数的三种形式。
a. 使用Action的属性接收(直接在action中利用get方法来接收参数):
login.jsp
< form action= "LoginAction" method = "post"> < input type= "text" name = "username">< br /> < input type= "password" name = "userpwd">< br /> < input type= "submit" value = "提交">
LoginAction.java
public class LoginAction extends ActionSupport { public String username ; public String userpwd ; public String getUsername() { return username ; } public void setUsername(String username) { this .username = username ; } public String getUserpwd() { return userpwd ; } public void setUserpwd(String userpwd) { this .userpwd = userpwd ; } public String execute(){ String result= "input" ; if (getUsername().equals("lichenyu" )&&getUserpwd().equals( "123456")){ // result="input"; } else { result= "error" ; } return result ; } }
b.使用 DomainModel接收参数:
login.jsp
< form action= "LoginAction" method = "post"> < input type= "text" name = "user.username">< br /> < input type= "password" name = "user.userpwd">< br /> < input type= "submit" value = "提交"> </ form>
新建User.java
public class User { public String username ; public String userpwd ; public String getUsername() { return username ; } public void setUsername(String username) { this .username = username ; } public String getUserpwd() { return userpwd ; } public void setUserpwd(String userpwd) { this .userpwd = userpwd ; } }
LoginAction.java(此处必须添加user的set和get方法)
public class LoginAction extends ActionSupport { private User user ; public User getUser() { return user ; } public void setUser(User user) { this .user = user ; } public String execute(){ String result= "input" ; System. out .println(user .username ); return result ; } }
c.使用 ModelDriven接收参数:
login.jsp
public class LoginAction extends ActionSupport { private User user ; public User getUser() { return user ; } public void setUser(User user) { this .user = user ; } public String execute(){ String result= "input" ; System. out .println(user .username ); return result ; } }
User.java同方法b中
LoginAction.java
public class LoginAction extends ActionSupport implements ModelDriven<User> { User user= new User(); public String execute(){ String result= "input" ; System. out .println(user .username ); System. out .println(user .getUsername()); return result ; } @Override public User getModel() { // TODO Auto-generated method stub return user ; } }
d.使用request来接收参数:
使Action支持request后可用此方法进行传值。
HttpServletRequest request=ServletActionContext.getRequest();
String username=request.getParameter("username");
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