集合轉字符串

調用接口時輸入數據為List<>集合，可利用Joiner.on(",").join(ids);轉化為字符串（以“，”分割）

 

 /*  依賴 <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
    <dependency>
      <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
      <version>28.0-jre</version>
    </dependency>*/
    @Test
    public void testJoiner(){
        List ids=new ArrayList<String>();
        ids.add("1");
        ids.add("2");
        String idStr = Joiner.on(",").join(ids);
        System.out.println(idStr);
    }

 

更多詳解：https://blog.csdn.net/wwwdc1012/article/details/82228458