利用BodyTagSupport建立帶標籤體的自定義標籤
- 建立自定義標籤的處理類
PersonTag.java，須要繼承BodyTagSupport類，並重寫doStartTag方法，在該方法內部實現渲染咱們業務上須要展現的html對應的邏輯。
package com.terwergreen;
import com.terwergreen.util.StringUtil;
import org.apache.commons.beanutils.PropertyUtils;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
* PersonTag
*
* @author Terwer
* @version 1.0
* 2019/10/16 14:24
**/
public class PersonTag extends BodyTagSupport {
protected String personName;
protected String loginName;
protected String personId;
protected Boolean layer = Boolean.TRUE;
protected Object bean;
public String getPersonName() {
return personName;
}
public void setPersonName(String personName) {
this.personName = personName;
}
public String getLoginName() {
return loginName;
}
public void setLoginName(String loginName) {
this.loginName = loginName;
}
public String getPersonId() {
return personId;
}
public void setPersonId(String personId) {
this.personId = personId;
}
public Boolean getLayer() {
return layer;
}
public void setLayer(Boolean layer) {
this.layer = layer;
}
public Object getBean() {
return bean;
}
public void setBean(Object bean) {
this.bean = bean;
}
public int doStartTag() throws JspException {
try {
String cxpath = ((HttpServletRequest) pageContext.getRequest())
.getContextPath();
StringBuffer sb = new StringBuffer();
List<Map<String, String>> list = this.parseToOrgList();
for (int i = 0; i < list.size(); i++) {
Map<String, String> tmpPerson = list.get(i);
if (list.size() > 1 && i != list.size() - 1) {
tmpPerson.put("fdName", tmpPerson.get("fdName") + ";");
}
sb.append(render(cxpath, tmpPerson,
layer != null ? layer.booleanValue() : true));
}
pageContext.getOut().print(sb.toString());
} catch (Exception e) {
e.printStackTrace();
}
return SKIP_BODY;
}
public static StringBuffer render(String cxpath,
Map<String, String> tmpPerson, boolean layer) {
StringBuffer sb = new StringBuffer();
sb.append("<a class=\"com_author\" " + " href=\"javascript:void(0) \"");
// sb.append("<a class=\"com_author\" "
// + "href=\""
// + cxpath
// + "/sys/person/sys_person_zone/sysPersonZone.do?method=view&fdId="
// + tmpPerson.get("fdId") + "\" target=\"_blank\"");
if (layer) {
sb.append(" ajax-href=\"" + cxpath + "/sys/zone/resource/zoneInfo.jsp?fdId=" + tmpPerson.get("fdId") + "\"");
sb.append(" onmouseover=\"if(window.LUI && window.LUI.person)window.LUI.person(event,this);\"");
}
sb.append(">");
sb.append(org.apache.commons.lang.StringEscapeUtils.escapeHtml(tmpPerson.get("fdName")));
sb.append("</a>");
return sb;
}
private List<Map<String, String>> parseToOrgList() throws Exception {
List<Map<String, String>> rtnList = new ArrayList<Map<String, String>>();
if (StringUtil.isNotNull(personId)) {
if (personId.indexOf(";") > -1) {
String[] persons = personId.split(";");
String[] names = null;
if (StringUtil.isNotNull(personName)) {
names = personName.split(";");
}
for (int i = 0; i < persons.length; i++) {
rtnList.add(parseToMap(persons[i], names == null ? null
: (names[i] == null ? null : names[i]), loginName));
}
} else {
rtnList.add(parseToMap(personId, personName, loginName));
}
} else if (bean != null) {
Object tmpBean = null;
if (bean instanceof String) {
String beanCfg = (String) bean;
if (beanCfg.indexOf(";") > -1) {
String[] beans = beanCfg.split(";");
for (int i = 0; i < beans.length; i++) {
rtnList.add(parseToMap(pageContext
.getAttribute(beans[i])));
}
} else {
tmpBean = pageContext.getAttribute(beanCfg);
}
} else {
tmpBean = bean;
}
if (tmpBean != null) {
if (tmpBean instanceof Object[]) {
Object[] beans = (Object[]) tmpBean;
for (int i = 0; i < beans.length; i++) {
rtnList.add(parseToMap(beans[i]));
}
} else if (tmpBean instanceof List) {
List<?> beans = (List<?>) tmpBean;
for (int i = 0; i < beans.size(); i++) {
rtnList.add(parseToMap(beans.get(i)));
}
} else if (tmpBean instanceof Map) {
Map beans = (Map) tmpBean;
for (Iterator iterator = beans.values().iterator(); iterator
.hasNext(); ) {
Object tmpObject = (Object) iterator.next();
rtnList.add(parseToMap(tmpObject));
}
} else {
rtnList.add(parseToMap(tmpBean));
}
}
}
return rtnList;
}
private Map<String, String> parseToMap(String fdId, String fdName,
String fdLoginName) throws Exception {
Map<String, String> map = new HashMap<String, String>();
map.put("fdId", fdId);
if (StringUtil.isNotNull(fdName)) {
map.put("fdName", fdName);
map.put("fdLoginName", fdLoginName);
} else {
try {
map.put("fdName", "唐有煒");
} catch (Exception e) {
map.put("fdName", "");
}
}
return map;
}
private Map<String, String> parseToMap(Object beanObj) throws Exception {
Map<String, String> map = new HashMap<String, String>();
if (beanObj != null) {
map.put("fdId", (String) PropertyUtils.getProperty(beanObj, "fdId"));
map.put("fdName",
(String) PropertyUtils.getProperty(beanObj, "fdName"));
map.put("fdLoginName",
(String) PropertyUtils.getProperty(beanObj, "fdLoginName"));
}
return map;
}
}
二、建立tld描述文件，位置放在 WEB-INF/tld/ui.tld 下javascript
<?xml version="1.0" encoding="UTF-8"?>
<taglib
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-jsptaglibrary_2_0.xsd"
version="2.0">
<tlib-version>2.0</tlib-version>
<jsp-version>2.0</jsp-version>
<short-name>ui</short-name>
<uri>http://www.landray.com.cn/tags/widget</uri>
<tag>
<name>person</name>
<tag-class>com.terwergreen.PersonTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<description>personId</description>
<name>personId</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
<description>personName</description>
<name>personName</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
<description>bean</description>
<name>bean</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.Object</type>
</attribute>
<attribute>
<description>layer</description>
<name>layer</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.Boolean</type>
</attribute>
<!--
<attribute>
<description>loginName</description>
<name>loginName</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
-->
</tag>
</taglib>
三、web.xml 加入 taglibhtml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<jsp-config>
<taglib>
<taglib-uri>ui</taglib-uri>
<taglib-location>/WEB-INF/tld/ui.tld</taglib-location>
</taglib>
</jsp-config>
</web-app>
四、建立測試頁面java
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="/WEB-INF/tld/ui.tld" prefix="ui" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<div>Hello World</div>
<ui:person personId="111111111"></ui:person>
</body>
</html>
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相關文章
- 1. 自定義標籤
- 2. jsp標籤（自定義標籤）
- 3. JSTL標籤庫&自定義標籤
- 4. JSP自定義標籤——傳統標籤
- 5. java 帶父標籤的自定義標籤
- 6. javaweb帶父標籤的自定義標籤
- 7. JSP自定義標籤（一）：自定義JSP簡單標籤
- 8. Struts2自定義標籤4自定義分頁標籤
- 9. Spring的自定義標籤
- 10. Java --- Jsp內置標籤、jstl標籤庫及自定義標籤