自定义JSP标签

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
    <tlib-version>1.0</tlib-version>
    <jsp-version>1.1</jsp-version>
    <short-name>h2y-tags</short-name>
    <uri>/h2y-tags</uri>
    
    <!--input tag-->
    <tag>
        <name>input</name>
        <tag-class>com.xgh.edusite.tag.InputTag</tag-class>
        <body-content>empty</body-content>
        <attribute>
            <name>id</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>type</name>
            <required>true</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>name</name>
            <required>true</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>value</name>    
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>css</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>style</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>title</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>dictcode</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>onclick</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>initoption</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>    
            
        <attribute>
            <name>readonly</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>onchange</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        
        <attribute>
            <name>disabled</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
    </tag>
</taglib>    

package com.xgh.edusite.tag;


import com.xgh.mng.entity.SysDictDetail;
import org.apache.commons.lang.StringUtils;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
import javax.servlet.jsp.tagext.TagSupport;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * 自定义标签（select、checkbox、radio）
 */
public class InputTag extends TagSupport {

    /**
     *
     */
    private static final long serialVersionUID = 1L;
    private String id;//元素id
    private String name;//元素名称
    private String type;//编辑类型
    private String dictcode;//字典编码
    private String title;//标题信息
    private String value;//元素值
    private String css;//元素class属性
    private String style;//元素style样式
    private Object initoption;//select 初始化选项value,text:value,text
    private String readonly;//只读属性
    private String onclick;//单击事件
    private String onchange;//事件
    private String disabled;//禁用

    private static String inputRadioF = "<input type=\"radio\" id=\"%s\"  name=\"%s\"    value=\"%s\"   class=\"%s\"  title=\"%s\"  style=\"%s\"  %s    /><label for=\"%s\">%s</label>&nbsp;&nbsp;";
    private static String inputCheckboxF = "<input type=\"checkbox\"  id=\"%s\"  name=\"%s\"    value=\"%s\"   class=\"%s\"  title=\"%s\"  style=\"%s\"   %s   /><label for=\"%s\">%s</label>&nbsp;&nbsp;";
    private static String inputSelectF = "<select  id=\"%s\"  name=\"%s\" class=\"%s\"  title=\"%s\"  style=\"%s\"   %s    >";
    private static String selectOptionF = "<option value=\"%s\" title=\"%s\"  %s>%s</option>";

    private void clear() {
        this.id = null;
        this.css = null;
        this.dictcode = null;
        this.name = null;
        this.style = null;
        this.title = null;
        this.type = null;
        this.onclick = null;
        this.initoption = null;
        this.readonly = null;
        this.onchange = null;
        this.disabled = null;
    }

    public int doEndTag() throws JspException {
        clear();
        return Tag.EVAL_PAGE;
    }

    public int doStartTag() throws JspException {

        //sysCacheService = (ISysCacheService) IocUtil.getBean("sysCacheService");

        String htmlText = null;
        if ("checkbox".equals(this.getType())) {
            htmlText = getCheckboxHtml();
        } else if ("radio".equals(this.getType())) {
            htmlText = getRadioHtml();
        } else if ("select".equals(this.getType())) {
            htmlText = getSelectHtml();
        }

        try {
            pageContext.getOut().write(htmlText);
        } catch (Exception e) {
            e.printStackTrace();
            throw new JspException("write   error!");
        }
        return SKIP_BODY;
    }


    /**
     * 得到checkBox控件html
     *
     * @return
     */
    public String getRadioHtml() {

        StringBuffer html = new StringBuffer();

        List<SysDictDetail> sysDictDetails = getListDictDetail();

        if (sysDictDetails != null && !sysDictDetails.isEmpty()) {

            for (SysDictDetail sysDictDetail : sysDictDetails) {

                html.append(String.format(inputRadioF,
                        this.getId() + "_" + sysDictDetail.getCode(),
                        this.getName(),
                        sysDictDetail.getCode(),
                        this.getCss(),
                        this.getTitle(),
                        this.getStyle(),
                        this.getValue().equals(sysDictDetail.getCode()) ? " checked=\"checked\" " : "" +
                                this.getOnclick() + this.getOnchange() + this.getReadonly() + this.getDisabled(),
                        this.getId() + "_" + sysDictDetail.getCode(),
                        sysDictDetail.getValue()
                ));
            }
        }
        return html.toString();
    }


    /**
     * 得到checkBox控件html
     *
     * @return
     */
    public String getCheckboxHtml() {

        StringBuffer html = new StringBuffer();

        String[] vals = this.getValue().split(",");

        List<SysDictDetail> sysDictDetails = getListDictDetail();

        if (sysDictDetails != null && !sysDictDetails.isEmpty()) {

            for (SysDictDetail sysDictDetail : sysDictDetails) {

                html.append(String.format(inputCheckboxF,
                        this.getId() + "_" + sysDictDetail.getCode(),
                        this.getName(),
                        sysDictDetail.getCode(),
                        this.getCss(),
                        this.getTitle(),
                        this.getStyle(),
                        this.getCheckboxChecked(vals, sysDictDetail.getCode()) +
                                this.getOnclick() + this.getOnchange() + this.getReadonly() + this.getDisabled(),
                        this.getId() + "_" + sysDictDetail.getCode(),
                        sysDictDetail.getValue()
                ));
            }
        }
        return html.toString();
    }

    /**
     * 得到select控件html
     *
     * @return
     */
    public String getSelectHtml() {

        StringBuffer html = new StringBuffer();

        html.append(String.format(inputSelectF,
                this.getId(),
                this.getName(),
                this.getCss(),
                this.getTitle(),
                this.getStyle(),
                this.getOnclick() + this.getOnchange() + this.getReadonly() + this.getDisabled()
        ));

        List<SysDictDetail> sysDictDetails = getListDictDetail();

        if (sysDictDetails != null && !sysDictDetails.isEmpty()) {

            for (SysDictDetail sysDictDetail : sysDictDetails) {
                html.append(String.format(selectOptionF,
                        sysDictDetail.getCode(),
                        sysDictDetail.getValue(),
                        this.getValue().equals(sysDictDetail.getCode()) ? "selected=\"selected\"" : "",
                        sysDictDetail.getValue()
                ));
            }
        }
        return html.toString() + "</select>";
    }

    /**
     * 得到复选框是否选中
     *
     * @param vals
     * @param value
     * @return
     */
    private String getCheckboxChecked(String[] vals, String value) {

        if (vals != null && vals.length > 0) {
            for (String string : vals) {
                if (string.equals(value)) {
                    return " checked=\"checked\" ";
                }
            }
        }
        return "";
    }


    /**
     * 获取字典列表项，一级初始化的选项
     *
     * @return
     */
    private List<SysDictDetail> getListDictDetail() {

        List<SysDictDetail> list = new ArrayList<SysDictDetail>();

        //添加自定义选项列表到集合中
        addOptionsToList(list);

        if (this.getDictcode() != null && !this.getDictcode().equals("")) {
            //list.addAll(DictUtil.getDetailListByMainCode(sysCacheService.getLoginunitId(pageContext.getSession().getId()), this.getDictcode()));
        }
        return list;
    }

    /**
     * 添加自定义选项列表到集合中
     *
     * @return
     */
    private void addOptionsToList(List<SysDictDetail> list) {

        //字符串
        if (this.getInitoption() instanceof String) {

            String temp = (String) this.initoption;
            String[] atemp = temp.split(":");
            if (atemp != null) {
                for (String astr : atemp) {
                    String[] items = astr.split(",");
                    if (items.length == 2) {
                        SysDictDetail sysDictDetail = new SysDictDetail();
                        sysDictDetail.setCode(items[0]);
                        sysDictDetail.setValue(items[1]);
                        list.add(sysDictDetail);
                    }
                }
            }
        } else if (this.getInitoption() instanceof ArrayList<?>) {//列表

            List<Map<String, Object>> initList = (ArrayList<Map<String, Object>>) this.initoption;
            for (Map<String, Object> obj : initList) {
                SysDictDetail sysDictDetail = new SysDictDetail();
                sysDictDetail.setCode(obj.get("value").toString());
                sysDictDetail.setValue(obj.get("text").toString());
                list.add(sysDictDetail);
            }
        }
    }

    public String processOnClick() {

        return " onclick=\"" + onclick + "\" ";
    }

    public String processOnChange() {
        return css;
    }


    public String processReadonly() {
        return css;

    }

    public String processDisabled() {


        return css;
    }


    public String getId() {

        if (id == null) {
            return "";
        }
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {

        if (name == null) {
            return "";
        }
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getType() {

        if (type == null) {
            return "";
        }
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getDictcode() {
        if (dictcode == null) {
            return "";
        }
        return dictcode;
    }

    public void setDictcode(String dictcode) {
        this.dictcode = dictcode;
    }

    public String getTitle() {
        if (title == null) {
            return "";
        }
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getValue() {

        if (value == null) {
            return "";
        }
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public String getCss() {
        if (css == null) {
            return "";
        }
        return css;
    }

    public void setCss(String css) {
        this.css = css;
    }


    public String getStyle() {

        if (style == null) {
            return "";
        }
        return style;
    }

    public void setStyle(String style) {
        this.style = style;
    }


    public String getOnclick() {

        if (StringUtils.isNotBlank(onclick)) {
            return " onclick=\"" + onclick + "\" ";
        }
        return "";
    }

    public void setOnclick(String onclick) {
        this.onclick = onclick;
    }

    public Object getInitoption() {
        return initoption;
    }

    public void setInitoption(Object initoption) {
        this.initoption = initoption;
    }

    public String getReadonly() {

        if (StringUtils.isNotBlank(readonly) && readonly.equals("readonly")) {
            return " readonly=\"readonly\" ";
        }
        return "";
    }

    public void setReadonly(String readonly) {
        this.readonly = readonly;
    }


    public String getOnchange() {

        if (StringUtils.isNotBlank(onchange)) {
            return " onchange=\"" + onchange + "\" ";
        }
        return "";
    }

    public void setOnchange(String onchange) {
        this.onchange = onchange;
    }


    public String getDisabled() {

        if (StringUtils.isNotBlank(disabled) && disabled.equals("disabled")) {
            return " disabled=\"disabled\" ";
        }
        return "";
    }

    public void setDisabled(String disabled) {
        this.disabled = disabled;
    }
}