请求翻译一下，下边这串代码主要功能啥意思还有模糊查询和精准查询的代码谢

public//列表
    Map list(BaseParam baseParam,MarketIssueParam marketIssueParam) {
        Map<String, Object> list=new HashMap<>();
        PageHelper.startPage( baseParam.getPage(),baseParam.getLimit() );
        MarketKeywordExample marketKeywordExample=new MarketKeywordExample();
        MarketKeywordExample.Criteria criteria=marketKeywordExample.createCriteria();
        criteria.andDeletedEqualTo( true );
        if ( marketIssueParam.getId()!= null ) {
            criteria.andIdEqualTo( marketIssueParam.getId() );
        }
        if ( !StringUtils.isEmpty( marketIssueParam.getClass() ) ) {
            criteria.andKeywordEqualTo( marketIssueParam.getClass() );
        }
        if ( !StringUtils.isEmpty( marketIssueParam.toString() ) ) {
            criteria.andAddTimeBetween( "" + marketIssueParam.toString() + "" );
        }

        List<MarketIssue> marketKeywords =marketIssueMapper.selectByExample( marketIssueParam );
        PageInfo pageInfo=new PageInfo();

        list.put( "total",pageInfo.getTotal() );
        list.put( "pages",pageInfo.getPages() );
        list.put( "limit",pageInfo.getPageSize() );
        list.put( "page",pageInfo.getPageNum() );
        list.put( "list",pageInfo.getList() );
        return list;

    }

这串代码应该是用来分页的吧，模糊查询和精确查询的代码，你的意思是sql语句还是Java代码，sql我知道，但是Java的还真不清楚

分页  把marketKeywordExample的信息存进去   模糊精确查询你得在sql里面弄  精确就是=  模糊就是%%

public//列表
    Map list(BaseParam baseParam,MarketIssueParam marketIssueParam) {
        Map<String, Object> list=new HashMap<>();

        //分页，会对后面第一个执行的sql添加分页的条件
        PageHelper.startPage( baseParam.getPage(),baseParam.getLimit() );

        //这里是MarketKeywordExample的一些操作
        MarketKeywordExample marketKeywordExample=new MarketKeywordExample();
        MarketKeywordExample.Criteria criteria=marketKeywordExample.createCriteria();
        criteria.andDeletedEqualTo( true );
        if ( marketIssueParam.getId()!= null ) {
            criteria.andIdEqualTo( marketIssueParam.getId() );
        }
        if ( !StringUtils.isEmpty( marketIssueParam.getClass() ) ) {
            criteria.andKeywordEqualTo( marketIssueParam.getClass() );
        }
        if ( !StringUtils.isEmpty( marketIssueParam.toString() ) ) {
            criteria.andAddTimeBetween( "" + marketIssueParam.toString() + "" );
        }
        
        //这里是具体的sql查询 会被分页
        List<MarketIssue> marketKeywords =marketIssueMapper.selectByExample( marketIssueParam );

       /**      
         *这个地方写的好像有点问题，应该是PageInfo pageInfo=new PageInfo(marketKeywords);
         *这里的是PageHelper分页的 所以他会吧分页所需要的参数封装到PageInfo里面 
         *所以需要把它实例化出来 然后下面的getTotal、getPages等操作获取值
         */
        PageInfo pageInfo=new PageInfo();
       
        list.put( "total",pageInfo.getTotal() );
        list.put( "pages",pageInfo.getPages() );
        list.put( "limit",pageInfo.getPageSize() );
        list.put( "page",pageInfo.getPageNum() );
        list.put( "list",pageInfo.getList() );
        return list;
 
    }