基于struts2 自定义标签 分页

package com.wnlc.mytag; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.jsp.JspException; import org.apache.struts2.components.Component; import org.apache.struts2.views.jsp.ComponentTagSupport; import com.opensymphony.xwork2.util.ValueStack; import com.sun.org.apache.commons.beanutils.BeanUtils; import com.wnlc.exception.MyException; @SuppressWarnings( { "unchecked", "serial" }) public class Table extends ComponentTagSupport { private String id; private String name; private String property; private String classname; private String onclick; private String style; private String border; private String colspan; private String colspancount; private String indexList; private String index; private String count; private Iterator iterator; @Override public Component getBean(ValueStack arg0, HttpServletRequest arg1, HttpServletResponse arg2) { return new TableTagBean(arg0); } @Override protected void populateParams() { TableTagBean t = (TableTagBean) component; try { BeanUtils.copyProperties(t, this); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } @Override public int doStartTag() throws JspException { super.doStartTag(); try { Object lst = this.getStack().findValue(name); if (lst instanceof List) { iterator = ((List) lst).iterator(); } else if (lst instanceof Object) { List list = new ArrayList(); list.add(lst); iterator = list.iterator(); } else { List list = new ArrayList(); iterator = list.iterator(); } pageContext.getOut().write("<table "); if (style != null && !"".equals(style)) { pageContext.getOut().write(" style=\"" + style + "\""); } if (onclick != null && !"".equals(onclick)) { pageContext.getOut().write(" onclick=\"" + onclick + "\""); } if (classname != null && !"".equals(classname)) { pageContext.getOut().write(" class=\"" + classname + "\""); } if (border != null && !"".equals(border)) { pageContext.getOut().write(" border=\"" + border + "\""); } if (id != null && !"".equals(id)) { pageContext.getOut().write(" id=\"" + id + "\""); } pageContext.getOut().write("><tr>"); pageContext.setAttribute("head", "1"); } catch (IOException e) { e.printStackTrace(); } return EVAL_BODY_INCLUDE; } @Override public int doAfterBody() throws JspException { try { if (iterator.hasNext()) { Object o = iterator.next(); this.getStack().set(indexList, o); if (index != null) { Object countNumber = this.getStack().findValue(index); countNumber = countNumber == null ? "0" : countNumber; this.getStack().set(index, countNumber); } pageContext.setAttribute("head", "0"); this.getStack().set(indexList, o); if (index != null) { Object countNumber = this.getStack().findValue(index); countNumber = (Integer.parseInt((String) countNumber) + 1) + ""; this.getStack().set(index, countNumber); } pageContext.getOut().write("</tr><tr>"); return EVAL_BODY_AGAIN; } else { pageContext.getOut().write("</tr>"); } } catch (NumberFormatException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return EVAL_PAGE; } @Override public int doEndTag() throws JspException { // super.doEndTag(); try { pageContext.getOut().write("</table>"); if (colspan != null) { if (id == null) { throw new MyException("如果要用colspan属性需要对表格指定id属性！"); } pageContext.getOut().write("<script type='text/javascript' defer='defer'>"); colspancount = colspancount == null ? "-1" : colspancount; pageContext.getOut().write("colspan('" + id + "','" + colspan + "','" + colspancount + "');"); pageContext.getOut().write("</script>"); } } catch (IOException e) { e.printStackTrace(); } catch (MyException e) { e.printStackTrace(); } return EVAL_PAGE; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getProperty() { return property; } public void setProperty(String property) { this.property = property; } public String getClassname() { return classname; } public void setClassname(String classname) { this.classname = classname; } public String getOnclick() { return onclick; } public void setOnclick(String onclick) { this.onclick = onclick; } public String getStyle() { return style; } public void setStyle(String style) { this.style = style; } public String getBorder() { return border; } public void setBorder(String border) { this.border = border; } public String getColspan() { return colspan; } public void setColspan(String colspan) { this.colspan = colspan; } public String getColspancount() { return colspancount; } public void setColspancount(String colspancount) { this.colspancount = colspancount; } public String getIndexList() { return indexList; } public void setIndexList(String indexList) { this.indexList = indexList; } public String getIndex() { return index; } public void setIndex(String index) { this.index = index; } public String getCount() { return count; } public void setCount(String count) { this.count = count; } public Iterator getIterator() { return iterator; } public void setIterator(Iterator iterator) { this.iterator = iterator; } }