处理编码

EricsHu

2022-12-05 068fc7f2e81178e55fa191a13709af64b1a163f6

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package com.qxueyou.scc.exercise.service.impl.parser;
 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
import com.qxueyou.scc.exercise.service.impl.Node;
import com.qxueyou.scc.exercise.service.impl.ParseResult;
import com.qxueyou.scc.exercise.service.impl.Parser;
import com.qxueyou.scc.exercise.service.impl.node.Item;
import com.qxueyou.scc.exercise.service.impl.node.Option;
 
 
 
public class OptionParser extends Parser {
    
    /**
     * 习题选项编号模式[带括号]
     */
    //Pattern optNoWithBrackets = Pattern.compile("\\(?[ABCDEFabcdef]\\)?[、.．]");
    
    /**
     * 习题选项  word自带的格式的 a.a、a)    这三种较为普遍，目前03可以解析成功，07解析失败*[\t]
     */
    Pattern optNoWithBrackets = Pattern.compile("\\(?[ABCDEFGHIJKLMNOabcdefghijklmno]\\)?[.．、]");
    
    /**
     * 习题选项编号模式
     */
    Pattern optNo = Pattern.compile("[ABCDEFGHIJKLMNOabcdefghijklmno]");
    
 
    @Override
    public ParseResult parse(Node node, String str) {
        return parse((Option)node,str);
    }
    
    /**
     * 解析 Item
     * @param item
     * @param str
     * @return
     */
    private ParseResult parse(Option option, String str) {
        
        //习题选项
        Matcher optNoWithBracketsMatch = optNoWithBrackets.matcher(str);
        
        //尝试调用上级解析器继续解析
        if(!matchBegin(optNoWithBracketsMatch)){
            return new ParseResult(false,ParseResult.STEP_PRE,null);
        }
        
        Matcher optNoMatch = null;
        
        int start = 0;
        Option preOpt = null;
        
        optNoWithBracketsMatch.reset();
        while(optNoWithBracketsMatch.find()){
            
            String noWithBrackets = optNoWithBracketsMatch.group();
            optNoMatch = optNo.matcher(noWithBrackets);
            optNoMatch.find();
            String no = optNoMatch.group();
 
            Option opt = getOpt(no.toUpperCase(),(Item)option.getParent());
            
            if(start!=optNoWithBracketsMatch.start() && preOpt!=null){
                preOpt.setContent(
                        beautyContent(
                                str.substring(start, optNoWithBracketsMatch.start())
                                )
                        );    
            }
            preOpt = opt;
            start = optNoWithBracketsMatch.end();
            
            // 在最开始匹配成功即跳出循环
            //break ;
        }
        
        preOpt.setContent(beautyContent(str.substring(start, str.length())));
        
        return new ParseResult(true,ParseResult.STEP_CUR,null);
        
    }
    
    /**
     * 去除文本中多余字符
     * @param content
     * @return
     */
    private String beautyContent(String str){
        String prefix = ".。~、、．．)";
        String content = str;
        while(content.length()>0 && prefix.contains(content.substring(0, 1))){
            content = content.substring(1);
        }
        return content;
    }
    
    /**
     * 获取题目选项
     * @param no
     * @param item
     * @return
     */
    private Option getOpt(String no,Item item){
        Option opt = item.getOption(no);
        if(opt==null){
            
            opt = item.getOption("");
            
            if(opt==null){
                opt = new Option();
                item.addNode(opt);
                opt.setNo(no);
            }
        }
        return opt;
    }
}