StringJoiner可以嵌套使用的,简单使用常用于抛异常

package com.gang;

import java.util.Calendar;
import java.util.Date;
import java.util.HashSet;
import java.util.StringJoiner;

public class Harbor007 {
    public static void main(String[] args) {
       /* Calendar calendar = Calendar.getInstance();

        calendar.add(Calendar.SECOND,10);
        Date time = calendar.getTime();
        System.out.println(time);*/

      /*  HashSet set = new HashSet<>();
        set.add("1");
        set.add("1");
        set.add("1");
        System.out.println(set);*/

        StringJoiner notFourMustError = new StringJoiner("，");
        notFourMustError.add("刘备");
        notFourMustError.add("王道哈哈");
            StringJoiner result = new StringJoiner("，");
        System.out.println(notFourMustError);

        result.add(notFourMustError + "部分事项未审核，请审核后在结束会议");

        System.out.println(result.toString());


    }


    }

if (notFourMustError.length() != 0 || allFailErrorMessage.length() != 0) {
    StringJoiner result = new StringJoiner("，");

    if (notFourMustError.length() != 0) {
        result.add(notFourMustError + "部分事项未审核，请审核后在结束会议");
    }

    if (allFailErrorMessage.length() != 0) {
        result.add(allFailErrorMessage + "影响任免，不允许结束会议");
    }

    throw new SystemAccountException(result.toString());
}

    select
    
        gbrm06.RECORDID                                     as recordId,
        gbrm06.GLOBALID                                     as globalId,
        gbrm06.a00                                          as a00,
        gbrm06.A0101                                        as a0101,
        gbrm06.A0104                                        as a0104,
        gbrm06.FLOWTYPEID                                   as flowTypeId,
        gbrm06.FLOWTYPENAME                                 as flowTypeName,
        gbrm06.GBRM0601                                     as gbrm0601,
        gbrm06.GBRM0602                                     as gbrm0602,
        gbrm06.GBRM0603                                     as gbrm0603,
        gbrm06.GBRM0605                                     as gbrm0605,
        gbrm06.GBRM0605A                                    as gbrm0605a,
        gbrm06.gbrm0680                                     as gbrm0680,
        gbrm06.gbrm0608                                     as gbrm0608,
        gbrm06.registrationtype                             as registrationtype,
        case when PUSHTIME is null then false else true end as pushed,
        ${fieldSql}
    
    from gbrm06
    
        ${joinSql}
    
    where gbrm06.DELETEFLAG = 0
      and gbrm06.MEETTYPE = #{meetType}
      and gbrm06.USERGROUPID = #{userGroupId}
    
        and gbrm06.A0101 = #{a0101}
    
    and gbrm06.ISSHOW = 1
    
        
            
                
                    and gbrm06.GBRM0607 = #{groupId}
                    order by gbrm06.GBRM0607A desc
                
                
                    and gbrm06.GBRM0606 = #{groupId}
                    order by gbrm06.GBRM0606A desc
                
            
        
        
            order by gbrm06.PORDER desc
        
    

package com.gang;
 
import java.util.Arrays;
import java.util.List;
import java.util.StringJoiner;
import java.util.stream.Collectors;
 
public class Test08 {
    public static void main(String[] args) {
        List list = Arrays.asList("大大", "的武当派开完票");
        System.out.println(list.stream().collect(Collectors.joining("$$$")));
 
    }
}