struts2笔记.xls

v c 表示层 jsp 控制层 servlet struts2 userWorld helloWorld struts xml文件 success jsp error jsp public class Struts2Filter implements Filter private Map map new HashMap public void init FilterConfig filterConfig throws ServletException map put primer userAction action cn itcast web UserAction map put helloworld helloworldAction action cn itcast web HelloworldAction public void doFilter ServletRequest req ServletResponse res FilterChain chain throws IOException ServletException String path request getServletPath System out println path path Action action Action Class forName map get path newInstance action execute request getRequestDispatcher success jsp forward request response 加载 路径需要pg自己写 userWorld helloWorld struts xml文件 xml文件名称必须是struts xml 放置在src下 类路径下 该文件的配置自己写 要遵循dtd规范 struts2提供的 success jsp error jsp struts2流程 struts xml文件 success jsp error jsp 过滤器struts2提供的的 加载 struts xml文件 xml文件名称必须是struts xml 放置在src下 类路径下 该文件的配置自己写 要遵循dtd规范 struts2提供的 success jsp error jsp M 业务层 bo Dao层 po 持久 spring hibernate public interface Action public String execute public class UserAction implements Action public String execute System out println UserAction return success public class HelloworldAction implements Action public String execute System out println HelloworldAction return error struts xml文件 success jsp error jsp 该接口是struts2提供的 作为pg实现该接口 public interface Action public String execute pg自己写的 public class UserAction implements Action public String execute System out println UserAction return success pg自己写的 public class HelloworldAction implements Action public String execute System out println HelloworldAction return error struts xml文件 success jsp error jsp public class Struts2Filter implements Filter private Map map new HashMap public void init FilterConfig filterConfig throws ServletException map put primer userAction action cn itcast web UserAction map put helloworld helloworldAction action cn itcast web HelloworldAction public void doFilter ServletRequest req ServletResponse res FilterChain chain throws IOException ServletException String path request getServletPath System out println path path Action action Action Class forName map get path newInstance action execute request getRequestDispatcher success jsp forward request response struts xml文件 xml文件名称必须是struts xml 放置在src下 类路径下 该文件的配置自己写 要遵循dtd规范 struts2提供的 success jsp error jsp public class HelloworldAction implements Action public String execute System out println HelloworldAction return error struts xml文件 xml文件名称必须是struts xml 放置在src下 类路径下 该文件的配置自己写 要遵循dtd规范 struts2提供的 success jsp error jsp 过滤器struts2提供的的 pg自己写的 public class HelloworldAction implements Action public String execute System out println HelloworldAction return error 客户端发送请求 primer helloWorldAction action a 9 struts2的过滤器 action result jsp html 分离关注 class A aa 1 2 3 4 class A1 1 class A2 2 class A3 3 class A4 4 struts2中使用分离关注方式 把完成具体任务的工作委托给多个类 完成 这样的类叫做拦截器 处理请求参数拦截器 处理Cookie拦截器 文件上传拦截器 表单重复提交拦截器 自定义拦截器 过滤器和拦截器区别 过滤器 javaee中的规范 任何javaweb中都可以使用 具有通用性 拦截器 是struts2中提出的概念 只拦截器action 离开了struts2框架拦截器不复存在 在struts中是过滤器来调用拦截器 struts2的过滤器 action result jsp html resulttype success jsp 转发到jsp public class ServletDispatcherResult extends StrutsResultSupport private String location public void setLocation String location resulttype success jsp this location location public String getLocation return location public void doExecute String finalLocation ActionInvocation invocation throws Exception HttpServletRequest request ServletActionContext getRequest HttpServletResponse response ServletActionContext getResponse RequestDispatcher dispatcher request getRequestDispatcher location dispatcher forward request response helloWorldAction primer 重定向到action public class ServletActionRedirectResult extends ServletRedirectResult protected String actionName protected String namespace public void setActionName String actionName this actionName actionName public void setNamespace String namespace this namespace namespace protected void doExecute String finalLocation ActionInvocation invocation HttpServletResponse response HttpServletResponse ctx get ServletActionContext HTTP RESPONSE sendRedirect response finalLocation protected void sendRedirect HttpServletResponse response String finalLocation response sendRedirect finalLocation helloWorldAction primer public class ServletDispatcherResult extends StrutsResultSupport private String location public void setLocation String location resulttype success jsp this location location public String getLocation return location public void doExecute String finalLocation ActionInvocation invocation throws Exception HttpServletRequest request ServletActionContext getRequest HttpServletResponse response ServletActionContext getResponse RequestDispatcher dispatcher request getRequestDispatcher location dispatcher forward request response public class ServletActionRedirectResult extends ServletRedirectResult protected String actionName protected String namespace public void setActionName String actionName this actionName actionName public void setNamespace String namespace this namespace namespace protected void doExecute String finalLocation ActionInvocation invocation HttpServletResponse response HttpServletResponse ctx get ServletActionContext HTTP RESPONSE sendRedirect response finalLocation protected void sendRedirect HttpServletResponse response String finalLocation response sendRedirect finalLocation aop userAction save action 模拟用户登陆 session setAttribute user user 如果用户没有登陆 则不能访问UserAction中的save方法 转到error jsp 如果用户登陆了 则能访问UserAction中的save方法 转到success jsp struts2的过滤器 处理参数的拦截器 处理Cookie的拦截器 自定义的拦截器 自定义的拦截器 Object obj session getAttribute user 用户没有登陆 if obj null return error error jsp 用于已经登陆 调用action中的save方法 error jsp public class UserAction extends ActionSupport public String save System out println save return success 模拟用户登陆 session setAttribute user user 如果用户没有登陆 则不能访问UserAction中的save方法 转到error jsp 如果用户登陆了 则能访问UserAction中的save方法 转到success jsp public class ValidateAction extends ActionSupport private String age private String username 第一个执行 先获取表单页面的值 public void setUsername String username this username username 第二个执行 public void validate 验证userName 第三个执行业务方法 public String login 进行业务逻辑判断 return success 验证 前台验证 客户端验证 javaScript验证 后台验证 服务器端验证 struts2 的验证机制 fff age xml配置文件 true public class RequiredStringValidator extends FieldValidatorSupport private boolean doTrim true public void setTrim boolean trim doTrim trim public boolean getTrim return doTrim public void validate Object object throws ValidationException String fieldName getFieldName username Object value this getFieldValue fieldName object String s String value if doTrim s s trim if s length 0 addFieldError fieldName object public class RegexFieldValidator extends FieldValidatorSupport private String expression a zA Z0 9 6 12 public void setExpression String expression this expression expression public void validate Object object throws ValidationException String fieldName getFieldName psw Object value this getFieldValue fieldName object aa Pattern pattern pattern Ppile expression String compare String value if trim compare compare trim Matcher matcher pattern matcher compare if matcher matches addFieldError fieldName object public class ValidateAction extends ActionSupport private String age private String username 第一个执行 先获取表单页面的值 public void setUsername String username this username username 第二个执行 public void validate 验证userName 第三个执行业务方法 public String login 进行业务逻辑判断 return success public class RequiredStringValidator extends FieldValidatorSupport private boolean doTrim true public void setTrim boolean trim doTrim trim public boolean getTrim return doTrim public void validate Object object throws ValidationException String fieldName getFieldName username Object value this getFieldValue fieldName object String s String value if doTrim s s trim if s length 0 addFieldError fieldName object public class RegexFieldValidator extends FieldValidatorSupport private String expression a zA Z0 9 6 12 public void setExpression String expression this expression expression public void validate Object object throws ValidationException String fieldName getFieldName psw Object value this getFieldValue fieldName object aa Pattern pattern pattern Ppile expression String compare String value if trim compare compare trim Matcher matcher pattern matcher compare if matcher matches addFieldError fieldName object public class OgnlValueStack implements ValueStack OgnlContext context OgnlContext Map集合 CompoundRoot root List集合 public class OgnlContext implements Map private Object root private Map values new HashMap 23 实际放置 public class CompoundRoot extends ArrayList request作用域 ValueStack valueStack ValueStack request getAttribute struts valueStack OgnlContext context Map集合 Map栈 CompoundRoot root List集合 对象栈 对象栈 List集合 Map栈 OgnlContext对象 Object root Map values Map valueStackAction 0 1 key value request key username psw CompoundRoot root List集合 对象栈 存放的数据 当前请求的action对象 调用valueStack set msg msgxxxx 方法 先放置数据到Map集合中 在把Map集合放置到List集合 对象栈 中 valueStack getRoot add 0 new Employee 自己直接放置对象到list 集合 对象栈 中 OgnlContext context Map集合 Map栈 request session application page 四个作用域中信息在Map栈放置 ognlAction test action cid 9 请求的参数值也在Map栈放置 default Person对象 2 3 HttpServletRequest request ServletActionContext getRequest request setAttribute username username request request setAttribute psw username request ServletContext sc ServletActionContext getServletContext sc setAttribute username username application sc setAttribute psw psw application application username psw Map栈 OgnlContext对象 Object root 复制 person person对象 id name age Map sessionMap ServletActionContext getContext getSession sessionMap put username username session sessionMap put psw psw session HttpServletRequest request ServletActionContext getRequest request setAttribute username username request request setAttribute psw username request ServletContext sc ServletActionContext getServletContext sc setAttribute username username application sc setAttribute psw psw application value username request psw request usernaem application public class OgnlContext implements Map private Object root private Map values new HashMap 23 实际放置 public class CompoundRoot extends ArrayList value key username psw CompoundRoot root List集合 对象栈 存放的数据 当前请求的action对象 调用valueStack set msg msgxxxx 方法 先放置数据到Map集合中 在把Map集合放置到List集合 对象栈 中 valueStack getRoot add 0 new Employee 自己直接放置对象到list 集合 对象栈 中 OgnlContext context Map集合 Map栈 request session application page 四个作用域中信息在Map栈放置 ognlAction test action cid 9 请求的参数值也在Map栈放置 psw application ServletContext sc ServletActionContext getServletContext sc setAttribute username username application sc setAttribute psw psw application username psw Map栈 OgnlContext对象 Object root person对象 id name age usernaem application ServletContext sc ServletActionContext getServletContext sc setAttribute username username application sc setAttribute psw psw application 用户名 电话 描述 用户名 电话 描述 cn itcast model Person 编辑 model userAction edit action id 1 public String edit 获取id 通过id查询数据库信息 模拟 User newUser new User newUser setUsername zhang newUser setTel 110 newUser setDes xxx 复制从数据库中查出的数据到栈顶对象 user setUsername newUser getUsername user setTel newUser getTel user setDes newUser getDes model edit jsp return edit edit jsp 用户名 电话 描述 edit jsp 用户名 电话 描述 数据回显的原理 当struts2解析该标签时 获取name属性的值username 以username为条件 到对象栈中查找PropertyName username 的属性 如果找到了 获取该属性的值 该属性的值就是的值 如果找到了 获取该属性的值 该属性的值 是 就是的值 如果没有找到了 的值 user对象 user newUser private User user new User User newUser new User newUser setUsername zhang newUser setTel 110 newUser setDes xxx user newUser edit jsp 用户名 电话 描述 username des tel cn itcast model Person edit jsp 用户名 电话 描述 栈顶 User对象new user对象 public class UserAction extends ActionSupport private Integer id private String userName private Date createTime private Edu edu public String save 获取request HttpServletRequest request ServletActionContext getRequest String id request getParameter id String userName request getParameter userName System out println id userName return success 编号 姓名 出生日期 学历id 学历名称 public interface TypeConverter public Object convertValue Map context Object target Member member String propertyName Object value Class toType public class DefaultTypeConverter implements TypeConverter 重写该方法 public Object convertValue Map context Object value Class toType return convertValue value toType public Object convertValue Map context Object target Member member String propertyName Object value Class toType return convertValue context value toType TypeConverter typeConverter new DefaultTypeConverter typeConverter convertValue Map context Object target Member member String propertyName Object value Class toType 入口方法 public class DefaultTypeConverter implements TypeConverter 重写该方法 public Object convertValue Map context Object value Class toType return convertValue value toType public Ob