其实一直都在使用常用工具类，只是从没去整理过，今天空了把一些常用的整理一下吧

怎么使用的一看就明白，另外还有注释，最后的使用pom引入的jar包

 

public class ApacheCommonsTest {    /**     * 从一个entity中把属性复制进另外一个entity中     *      * @throws Exception     */    @Test    public void testCopyNewBean() throws Exception {        StuForm form = new StuForm("lee", 18, 1, new Date(), true);        Stu stu = new Stu();         BeanUtils.copyProperties(form, stu);        System.out.println(stu.toString());            }        /**     * base64 加密解密     *      * @throws Exception     */    @Test    public void testBase64Code() throws Exception {            String name1 = "hello, my name is lee~";        System.out.println("Before: " + name1);                String name2 = Base64.encodeBase64String(name1.getBytes());        System.out.println("After encode: " + name2);                String name3 = new String(Base64.decodeBase64(name2));        System.out.println("After decode: " + name3);                        String url1 = "www.lee.com.cn";        System.out.println("URL Before: " + url1);                String url2 = Base64.encodeBase64URLSafeString(url1.getBytes());        System.out.println("URL After decode: " + url2);                String url3 = new String(Base64.decodeBase64(url2));        System.out.println("URL After decode: " + url3);    }        /**     * commons 下 collection 工具包     *      * @throws Exception     */    @Test    public void testCollection() throws Exception {        OrderedMap
     
       om = new LinkedMap
      
       ();        om.put("one", 1);        om.put("two", "2");        om.put("three", "three");        om.put("fore", 4);        om.put("five", "5");        System.out.println(om.firstKey());        System.out.println(om.nextKey("fore"));        System.out.println(om.previousKey("five"));                System.out.println("==============================");                BidiMap bm = new TreeBidiMap();        bm.put("three", "3");        bm.put("five", "isfive");        System.out.println(bm.getKey("isfive").toString());        System.out.println(bm.get("three"));                // 交换key和value        BidiMap newMap = bm.inverseBidiMap();        System.out.println(newMap.size());                System.out.println("==============================");                Bag
       
      
     

 

             
                 
      
       commons-codec
                  
      
       commons-codec
                  
      
       1.10
              
             
                 
      
       org.apache.commons
                  
      
       commons-collections4
                  
      
       4.1
              
             
                 
      
       commons-configuration
                  
      
       commons-configuration
                  
      
       1.10
              
     

 

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