关于java对“\n”进行切割的问题

阳光穿透心脏的1/2处 2023-06-09 15:23 9阅读 0赞

首先对我来写一个例子：

package com.tool.split;
    
    import com.tool.base.file.FileUtils;
    import org.junit.jupiter.api.Test;
    
    import java.util.List;
    
    /**
     * @author: zhangyu
     */
    public class SplitDemo {
        @Test
        public void splitTestDemo() {
            String path = "C:\\Users\\octopus\\Desktop\\beetle929\\output.txt";
            List<String> list = FileUtils.getFileToList(path);
            //String ss = "assadd\ndada\ndaggage";
            String[] strs = list.get(0).split("\\n");
            System.out.println(strs.length);
    
    
        }
    }

该文件的内容为：

2019-10-08 16:00:00:493 INFO [catalina-exec-20][PackCheckBllServiceImpl] - {"message":"开始调用算法推荐包材， BinPackingAlgorithm.execute(), 输入：------BinPackingProblem start ------\n-------boxes-----\nZ-03__极智嘉,0.0,0.0,0.0,0.0\nM-02__极智嘉,540.0,440.0,60.0,0.0\nM-03__极智嘉,670.0,550.0,60.0,0.0\nX-01__极智嘉,330.0,400.0,60.0,0.0\nX-03__极智嘉,550.0,650.0,60.0,0.0\n-------items-----\n18072110103__EDBLYZ001__0,360.0,260.0,20.0\n18072110103__EDBLYZ001__1,360.0,260.0,20.0\n18072110103__EDBLYZ001__2,360.0,260.0,20.0\n18072370103__EDBLYZ001__0,500.0,360.0,10.0\n18072370103__EDBLYZ001__1,500.0,360.0,10.0\n18072370103__EDBLYZ001__2,500.0,360.0,10.0\n18072370103__EDBLYZ001__3,500.0,360.0,10.0\n18072370103__EDBLYZ001__4,500.0,360.0,10.0\n18072370103__EDBLYZ001__5,500.0,360.0,10.0\n18072370103__EDBLYZ001__6,500.0,360.0,10.0\n18072370103__EDBLYZ001__7,500.0,360.0,10.0\n18072370103__EDBLYZ001__8,500.0,360.0,10.0\n18072370103__EDBLYZ001__9,500.0,360.0,10.0\n18072370103__EDBLYZ001__10,500.0,360.0,10.0\n18072370103__EDBLYZ001__11,500.0,360.0,10.0

不能进行字符串的拆分，这时候就要用到一个扩展包的功能，使用谷歌的

google.common.base.Splitter，该文件的maven文件为:

<dependency>
                <groupId>com.google.guava</groupId>
                <artifactId>guava</artifactId>
                <version>19.0</version>
           </dependency>

修改后的例子为:

@Test
        public void splitTestDemo() {
            String path = "C:\\Users\\octopus\\Desktop\\beetle929\\output.txt";
            List<String> list = FileUtils.getFileToList(path);
            String line = list.get(0);
            Iterable<String> result = Splitter.on("\\n").split(line);
            List<String> tempList = new ArrayList<>();
            for (String s : result) {
                tempList.add(new String(s));
            }
            System.out.println(tempList.size());
       }