displayrolerestag.java

一个关于tlms的一个小程序 看看能否帮助到别人

package com.szmx.tlms.admin.web.tag;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.displaytag.tags.el.ExpressionEvaluator;

import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import java.util.List;
import java.util.Iterator;

import com.szmx.tlms.admin.model.Resource;


public class DisplayRoleResTag extends TagSupport {
    private final Log log = LogFactory.getLog(getClass());
    private String name;
    private String value;
    private String onClick;
    private List resList;
    private String resource;

    public DisplayRoleResTag() {
    }

    public String getName() {
        return this.name;
    }

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

    public String getValue() {
        return this.value;
    }

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

    public String getOnClick() {
        return this.onClick;
    }

    public void setOnClick(String onClick) {
        this.onClick = onClick;
    }

    public String getResource() {
        return this.resource;
    }

    public void setResource(String res) {
        this.resource = res;
    }

    private void evalParams() throws JspException {
        ExpressionEvaluator evaluator = new ExpressionEvaluator(this, pageContext);
        this.resList = (List) evaluator.eval("resource", resource, List.class);
    }

    public int doStartTag() throws JspException {
        evalParams();
        JspWriter out = pageContext.getOut();
        StringBuffer html = new StringBuffer();
        html.append("<input type='checkbox' name='").append(name)
                .append("' value='").append(value)
                .append("' onClick='").append(onClick).append("'");
        if (resList != null) {
            for (Iterator i = resList.iterator(); i.hasNext();) {
                Resource res = (Resource) i.next();
                if (String.valueOf(res.getId()).equals(value)) {
                    html.append(" checked");
                    break;
                }
            }
        }
        html.append("/>");
        try {
            out.print(html);
        } catch (Exception e) {
            log.error(e);
            throw new JspException(e);
        }
        return super.doStartTag();
    }
}