htmlutil.java

来自「cwbbs 云网论坛源码」· Java 代码 · 共 128 行

package cn.js.fan.util;

import javax.servlet.http.*;

import cn.js.fan.web.*;
import com.cloudwebsoft.framework.util.*;
import com.redmoon.forum.*;
import org.htmlparser.*;
import org.htmlparser.filters.*;
import org.htmlparser.nodes.*;
import org.htmlparser.tags.*;
import org.htmlparser.util.*;


public class HtmlUtil {
    public static final int MAX_LEN2 = 3000;

    public HtmlUtil() {
    }

    
    public static boolean isTrimEmpty(String astr) {
        if ((null == astr) || (astr.length() == 0)) {
            return true;
        }
        if (isBlank(astr.trim())) {
            return true;
        }
        return false;
    }


    
    public static boolean isBlank(String astr) {
        if ((null == astr) || (astr.length() == 0)) {
            return true;
        } else {
            return false;
        }
    }

    public static String getAbstract(HttpServletRequest request, String htmlStr, int len) {
        String content = StrUtil.getLeft(htmlStr, len);

        
        int idx1 = content.lastIndexOf('<');
        int idx2 = content.lastIndexOf('>');
        
        
        if ((idx2 == -1 && idx1 >= 0) || (idx1 > idx2)) {
            String ct3 = htmlStr;
            int idx3 = ct3.indexOf('>', idx1);
            if (idx3!=-1) {
                if (idx3 < MAX_LEN2) {
                    content = ct3.substring(0, idx3 + 1);
                }
            }
        }

        
        idx2 = content.toLowerCase().lastIndexOf("</object>");
        idx1 = content.toLowerCase().lastIndexOf("<object");
        if ((idx2 == -1 && idx1 >= 0) || idx1 > idx2) {
            String ct2 = htmlStr.toLowerCase();
            int idx3 = ct2.indexOf("</object>");
            if (idx3 != -1)
                content += htmlStr.substring(content.length(), content.length() + idx3 + 9);
            else
                content = htmlStr.substring(0, idx1);
        }

        String str = "";
        try {
            Parser myParser;
            NodeList nodeList = null;
            myParser = Parser.createParser(content, "utf-8");
            NodeFilter textFilter = new NodeClassFilter(TextNode.class);
            NodeFilter linkFilter = new NodeClassFilter(LinkTag.class);
            NodeFilter imgFilter = new NodeClassFilter(ImageTag.class);
            
            
            OrFilter lastFilter = new OrFilter();
            lastFilter.setPredicates(new NodeFilter[] {textFilter, linkFilter,
                                     imgFilter});
            nodeList = myParser.parse(lastFilter);
            Node[] nodes = nodeList.toNodeArray();
            for (int i = 0; i < nodes.length; i++) {
                Node anode = (Node) nodes[i];
                String line = "";
                if (anode instanceof TextNode) {
                    TextNode textnode = (TextNode) anode;
                    
                    line = textnode.getText();
                } else if (anode instanceof ImageTag) {
                    ImageTag imagenode = (ImageTag) anode;
                    String url = imagenode.getImageURL();
                    String ext = StrUtil.getFileExt(url).toLowerCase();
                    
                    if (ext.equals("gif") || ext.equals("png") || ext.equals("jpg") || ext.equals("jpeg") || ext.equals("bmp")) {
                        
                        if (imagenode.getImageURL().startsWith("http"))
                            ; 
                        else if (imagenode.getImageURL().startsWith("/")) {
                            ; 
                        }
                        else { 
                            
                            url = request.getContextPath() + "/forum/" + imagenode.getImageURL();
                        }
                        line = "<div align=center><a onfocus=this.blur() href=\"" + url + "\" target=_blank><IMG SRC=\"" + url + "\" border=0 alt=" +
                                SkinUtil.LoadString(request,
                                 "res.cn.js.fan.util.StrUtil",
                                    "click_open_win") + " onload=\"javascript:if(this.width>screen.width-333) this.width=screen.width-333\"></a></div><BR>";
                        
                    }
                }
                if (isTrimEmpty(line))
                    continue;
                str += "<p>" + line + "</p>";
            }
        }
        catch (ParserException e) {
            LogUtil.getLog(MsgUtil.class.getName()).error("getAbstract:" + e.getMessage());
        }
        return str;
    }
}