Struts2中修改自定義標簽的源代碼使標簽不顯示
某些頁面中關于權限的顯示及鏈接的問題。可以通過修改Struts2里的自定義標簽的源代碼來使標簽不顯示
我以<s:a>為例
1、找到Struts2里面的標簽配置文件struts-tag.tld
Struts2標簽的源代碼配置文件struts-tag.tld
2、找到<name>a<name>節(jié)點
結點標簽
說明：tag節(jié)點代表一個struts2的標簽，里面有名稱、屬性、說明、源文件等內(nèi)容
3、打開org.apache.struts2.views.jsp.ui.AnchorTag
/*
* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts2.views.jsp.ui;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.components.Anchor;
import org.apache.struts2.components.Component;
import com.opensymphony.xwork2.util.ValueStack;
/**
* @see Anchor
*/
public class AnchorTag extends AbstractClosingTag {
private static final long serialVersionUID = -1034616578492431113L;
protected String href;
protected String includeParams;
protected String scheme;
protected String action;
protected String namespace;
protected String method;
protected String encode;
protected String includeContext;
protected String escapeAmp;
protected String portletMode;
protected String windowState;
protected String portletUrlType;
protected String anchor;
protected String forceAddSchemeHostAndPort;
public Component getBean(ValueStack stack, HttpServletRequest req, HttpServletResponse res) {
return new Anchor(stack, req, res);
}
protected void populateParams() {
super.populateParams();
Anchor tag = (Anchor) component;
tag.setHref(href);
tag.setIncludeParams(includeParams);
tag.setScheme(scheme);
tag.setValue(value);
tag.setMethod(method);
tag.setNamespace(namespace);
tag.setAction(action);
tag.setPortletMode(portletMode);
tag.setPortletUrlType(portletUrlType);
tag.setWindowState(windowState);
tag.setAnchor(anchor);
if (encode != null) {
tag.setEncode(Boolean.valueOf(encode).booleanValue());
}
if (includeContext != null) {
tag.setIncludeContext(Boolean.valueOf(includeContext).booleanValue());
}
if (escapeAmp != null) {
tag.setEscapeAmp(Boolean.valueOf(escapeAmp).booleanValue());
}
if (forceAddSchemeHostAndPort != null) {
tag.setForceAddSchemeHostAndPort(Boolean.valueOf(forceAddSchemeHostAndPort).booleanValue());
}
}
public void setHref(String href) {
this.href = href;
}
public void setEncode(String encode) {
this.encode = encode;
}
public void setIncludeContext(String includeContext) {
this.includeContext = includeContext;
}
public void setEscapeAmp(String escapeAmp) {
this.escapeAmp = escapeAmp;
}
public void setIncludeParams(String name) {
includeParams = name;
}
public void setAction(String action) {
this.action = action;
}
public void setNamespace(String namespace) {
this.namespace = namespace;
}
public void setMethod(String method) {
this.method = method;
}
public void setScheme(String scheme) {
this.scheme = scheme;
}
public void setValue(String value) {
this.value = value;
}
public void setPortletMode(String portletMode) {
this.portletMode = portletMode;
}
public void setPortletUrlType(String portletUrlType) {
this.portletUrlType = portletUrlType;
}
public void setWindowState(String windowState) {
this.windowState = windowState;
}
public void setAnchor(String anchor) {
this.anchor = anchor;
}
public void setForceAddSchemeHostAndPort(String forceAddSchemeHostAndPort) {
this.forceAddSchemeHostAndPort = forceAddSchemeHostAndPort;
}
}
4、在自己的項目中建一個與這個源代碼包名、類名一模一樣的類
說明：里面的代碼跟struts2里面的源代碼一樣復制過來
類
5、編輯
/*
* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts2.views.jsp.ui;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspException;
import org.apache.struts2.components.Anchor;
import org.apache.struts2.components.Component;
import com.opensymphony.xwork2.util.ValueStack;
import cn.zzuli.oa.domain.User;
/**
* @see Anchor
*/
public class AnchorTag extends AbstractClosingTag {
private static final long serialVersionUID = -1034616578492431113L;
protected String href;
protected String includeParams;
protected String scheme;
protected String action;
protected String namespace;
protected String method;
protected String encode;
protected String includeContext;
protected String escapeAmp;
protected String portletMode;
protected String windowState;
protected String portletUrlType;
protected String anchor;
protected String forceAddSchemeHostAndPort;
@Override
public int doEndTag() throws JspException {
//當前登錄用戶
User user = (User) pageContext.getSession().getAttribute("user");
//當前準備顯示鏈接對應的權限URL
String privUrl = action;
//去掉參數(shù)
int pos = privUrl.indexOf("?");
if(pos > -1) {
privUrl = privUrl.substring(0, pos);
}
//去掉UI后綴
if(privUrl.endsWith("UI")) {
privUrl = privUrl.substring(0, privUrl.length() - 2);
}
//根據(jù)用戶是否有這個權限，來判斷是否在頁面中顯示鏈接信息
if(user.hasPrivilegeByUrl("/" + privUrl)) {
return super.doEndTag();//正常的生成并顯示的超鏈接標簽，并繼續(xù)執(zhí)行頁面中后面的代碼
}else {
return EVAL_PAGE;//不生成不顯示超鏈接標簽，只是繼續(xù)執(zhí)行頁面中后面的代碼
}
}
public Component getBean(ValueStack stack, HttpServletRequest req, HttpServletResponse res) {
return new Anchor(stack, req, res);
}
protected void populateParams() {
super.populateParams();
Anchor tag = (Anchor) component;
tag.setHref(href);
tag.setIncludeParams(includeParams);
tag.setScheme(scheme);
tag.setValue(value);
tag.setMethod(method);
tag.setNamespace(namespace);
tag.setAction(action);
tag.setPortletMode(portletMode);
tag.setPortletUrlType(portletUrlType);
tag.setWindowState(windowState);
tag.setAnchor(anchor);
if (encode != null) {
tag.setEncode(Boolean.valueOf(encode).booleanValue());
}
if (includeContext != null) {
tag.setIncludeContext(Boolean.valueOf(includeContext).booleanValue());
}
if (escapeAmp != null) {
tag.setEscapeAmp(Boolean.valueOf(escapeAmp).booleanValue());
}
if (forceAddSchemeHostAndPort != null) { tag.setForceAddSchemeHostAndPort(Boolean.valueOf(forceAddSchemeHostAndPort).booleanValue());
}
}
public void setHref(String href) {
this.href = href;
}
public void setEncode(String encode) {
this.encode = encode;
}
public void setIncludeContext(String includeContext) {
this.includeContext = includeContext;
}
public void setEscapeAmp(String escapeAmp) {
this.escapeAmp = escapeAmp;
}
public void setIncludeParams(String name) {
includeParams = name;
}
public void setAction(String action) {
this.action = action;
}
public void setNamespace(String namespace) {
this.namespace = namespace;
}
public void setMethod(String method) {
this.method = method;
}
public void setScheme(String scheme) {
this.scheme = scheme;
}
public void setValue(String value) {
this.value = value;
}
public void setPortletMode(String portletMode) {
this.portletMode = portletMode;
}
public void setPortletUrlType(String portletUrlType) {
this.portletUrlType = portletUrlType;
}
public void setWindowState(String windowState) {
this.windowState = windowState;
}
public void setAnchor(String anchor) {
this.anchor = anchor;
}
public void setForceAddSchemeHostAndPort(String forceAddSchemeHostAndPort) {
this.forceAddSchemeHostAndPort = forceAddSchemeHostAndPort;
}
}
6、說明
系統(tǒng)會先加載classpath目錄下的代碼，如果沒有則再去jar包里面的加載。一般我們覆蓋doEndTag()方法即可。
