com.xxxxx.common.utils
ArrayUtils.java:
/**
*數組擴展類,可以動態增加數組的長度
*/
public final class ArrayUtils extends org.apache.commons.lang.ArrayUtils{
//擴展類型轉換
public static <T extends Serializable> T add(Class<T> clazz,Object[] array,Object element)
{return clazz.cast( add(array,element) );}
//反序
public static <T> T[] reversez(T[] array)
{reverse(array);
return array;}
//數組求和
public static int sumNum(int[] array){
int sum = 0;
for(int i : array){
sum += i;
}
return sum;
}
public static float sumNum(int[] array){
float sum = 0;
for(float f : array){
sum +=f;
}
return sum;
}
//比較2個數組是否有相同部分
public static boolean hasIntersection(String[] arr1, String[] arr2){
for(String a1 : arr1){
for(String a2 : arr2){
if(a1.equals(a2)){ return true;}
}
}
}
}
明天繼續補,剩下的.尤其是StringUtils.一共58個工具類.
PropertiesUtils
public class PropertiesUtil{
protected static final Map<String ,Properties> properties = new ConcurrentHashMap<>();
//1:加載配置文件
public static Properties loadRawProp(String path){
Properties props = new Properties();
InputStream in = ProperiesUtil.class.getResourceAsStream(path); //比如：path= "/config:properties"
try{ props.load(in)}catch(IOException e){ e.printStackTrace();}finally{
try{ if(in != null) in.close(); in = null; } catch(IOException e){e.printStackTrace();}
}
return props;
}
//2:加載配置文件
public static Properties loadProp(String path){
Properties p = properties.get(path);
if( p == null ){ p = loadRawProp(path); properties.put(path,p); }
return p;
}
//3:獲取apllication文件的內容
public static String getAppContext(String key){
Properties prop = loadProp("/config.properties");
String value = prop.getProperty(key);
return (value == null)? "" ::value;
}
//4:獲取apllication文件的內容，無內容，返回缺省值 (String)
public static String getAppContextString(String key, String defaultValue){
String value = getAppContext(key);
return StringUtils.isNotNullOrEmptyStr(value) ? value : defaultValue;
}
//獲取apllication文件的內容，無內容，返回缺省值(int)--項目中設置連接池最大鏈接數用到。
public static Integer getAppContextInt(String key, int defaultValue){
try{ String value = getAppContext(key);
return Integer.parseInt(value);
}catch(Exception e){return defaultValue;}
}
//獲取apllication文件的內容，無內容，返回缺省值(long)
public static Long getAppContextInt(String key, long defaultValue){
try{ String value = getAppContext(key);
return Long.parseLong(value);
}catch(Exception e){return defaultValue;}
}
//5:獲取mailmodule文件的內容-----我沒用過
public static String getMailContext(String key){
Properties prop = loadProp("/mailmodual.properties");
String value = prop.getProperty(key);
return (value == null)?"" : value;
}
//6:獲取msgmodule文件的內容-----我依然沒用過
public static String getMsgContext(String key){
Properties prop = loadProp("/sendmessages.properties");
String value = prop.getProperty(key);
return (value == null)?"" : value;
}
}
嗯，第二個完成。
BeanUtils
public class BeanUtils extends org.apache.commons.beanutils.BeanUtils{
//1：轉換屬性名--把首字母爲大寫（好匹配方法名）
private static final String converPropertyName(String propertyName) throws Exception{
if(propertyName == null || propertyName.length() == 0){ throw new Exception("屬性名必須指定");}
String first = propertyName .substring(0,1).toUpperCase();//首字母
String str = propertyName.substring(1);//剩下的部分
String newpropertyName = String.format("%s%s",first,str);
return newpropertyName;
}
//2:複製屬性名（1值設置給2）--幹嘛用？、難道new對象，把現有的bean複製給他，這樣就有值？項目中 編輯保存的時候用了一次，可以無視
public static final void copyNoBlank(Object bean1,Object bean2)throws Exception{
if( !bean1.getClass().equals(bean2.getClass()) )｛throw new Exception("拷貝類型不一致");｝
List<properties> properties = BeanUtils.getProperties(bean1,String.class);
for(String name : properties ){
Object value = BeanUtils.getValue(bean1,name);
if(value instanceof String){
String val = (String) value;
if(val != null) BeanUtils.setValue(bean2,name,val);
}
}
}
//3.獲取Bean的屬性名 -----這個常用，用到了反射。
public static final List<String> getProperties(Object bean ,Class<?> clazz) throws Exception{
Field[] fields = bean.getClass().getDeclaredFields();
List<String> retlist = new LinkedList<>();
//遍歷得到的 屬性數組
for(Field field :fields){
//獲取屬性的泛型，
if(field.getGenericType().toString.contains(clazz.getName())){
retlist.add( field.getName() );
}
}
return retlist;
}
//4：設置屬性值 （value應該是set方法的入參）
public static final void setValue(Object bean ,String propertyName,Object value)throws Exception{
String methodName = String.format("set%s",converPropertyName(propertyName));
Method m = bean.getClass().getMethod(methodname,value.getClass());
m.invoke(bean,new Object[]{value});
}
//5:獲取屬性值
public static final Object getValue(Object bean,String propertyName)throws Exception{
String methodName = String.format("get%s",converPropertyName(propertyName));
Method m = bean.getClass().getMethod(methodName);
Object value = m.invoke(bean);
return value;
}
//6:獲取樹形列表
//TreeItf 是一個接口：getRowId(); getParentRowId();getChildren();setChildren(List<TreeItf children>);
public static final List<TreeItf> getTreeList(List<TreeItf> allList,String rootId){
List<TreeItf> retlist = new LinkedList<>();
if(allList == null || allList.isEmpty()){ return retlist;}
//遍歷樹形列表
for（TreeList item : allList）｛
if( (StringUtils.isBlank(rootId) && StringUtils.isBlank(item.getParentRowId()) ) ||
rootId.equals(item.getParentRowId()) )
item.setChildren( getTreeList(allList,item.getRowId()) );
retlist.add(item);
｝
}
return retlist;
//7:main 方法 測試用
public static void main (String[] args)throws Exception{
UserModel user = new UserModel();
System.out.println(getProperties(user,String.class));
}
}
第三個完成，yeah.
CookieUtils工具類
public class CookieUtils{
public static final int COOKIE_MAX_AGE = 7*24*3600;//一週
public static final int COOKIE_HALF_HOUR= 30*60; //30min
//1:根據cookie名稱得到cookie對象,若不存在返回null
public static Cookie getCookie(HttpServletRequest request,String name) {
Cookie[] cookies = request.getCookies();
if(isEmptyArray(cookies)){return null;}
Cookie cookie = null;
//遍歷cookie數組
for(Cookie c :cookies){
if(name.equals(c.getName())){cookie = c; break; }
}
return cookie;
}
//2:根據cookie 名稱直接得到cookie值
public static String getCookieValue(HttpServletRequest request,String name){
Cookie cookie = getCookie(request,name);
if(cookie != null ) return cookie.getValue();
return null;
}
//3:移除cookie (根據cookie名稱)
public static void removeCookie(HttpServletRequest request,HttpServletResponse response ,String name){
if(name == null ) return ;
Cookie cookie = getCookie(request,name);
if(null != cookie ){
cookie.setPath("/");
cookie.setValue("");
cookie.setMaxAge(0);
response.addCookie(cookie);
}
}
//4.添加一條新的cookie,可以指定過期時間（單位：秒）
public static void setCookie（HttpServletResponse response response，String name，String value ,int maxValue）｛
if(StringUtils.isBlank(name)) return ;
if(null == value) value = "";
Cookie cookie = new Cookie(name,value);
cookie.setPath("/");
if(maxValue != 0 ) {cookie.setValue(maxValue);} else{cookie.setMaxAge(COOKIE_HALF_HOUR);}
response.addCookie(cookie);
try{response.flushBuffer();}catch(IOException e){e.printStackTrace();}
}
//5.添加一條新的cookie,默認30分鐘過期時間
public static void setCookie(HttpServletResponse response response，String name，String value){
setCookie(response,name,value,COOKIE_HALF_HOUR);
}
//6:把cookie 封裝到map裏
public static Map<String ,Cookie> getCookieMap(HttpServletRequest request){
Map<String，Cookie> cookieMap = new HashMap<>();
Cookie[] cookies = request.getCookies();
if ( ! isEmptyArray(cookies)){
for(Cookie c :cookies){
cookieMap.put(cookie.getName(),cookie);
}
}
return cookieMap;
}
//7:判斷cookie數組是否爲空
private static boolean isEmptyArray(Cookie[] cookies){
return cookies == null || cookies.length == 0;
}
}
SpringUtils 如下:
/*一組getBean方法*/
@Service
public class SpringUtils implements BeanFactoryAware{
static Logger log = LoggerFactory.getLogger(SpringUtils.class);
private static BeanFactory beanFactory;
//1:通過Bean的id從上下文中拿出該對象
public static Object getBean(String beanId){
return beanFactory == null ? null :beanFactory.getBean(beanId);
}
通過Bean的id從上下文中拿出該對象
public static <T> T getBean(Class<T> clazz, String beanId){
return beanFactory == null ? null :clazz.cast(beanFactory.getBean(beanId));
}
//2:通過bean的type從上下文中拿出該對象
public static <T> getBean(Class<T> clazz){
return beanFactory == null ? null :beanFactory.getBean(clazz);
}
通過bean的type從上下文中拿出該對象 -該方法整個項目沒用到，啥用？
public void setBeanFactory(BeanFactory beanFactory)throws Exception{
SpringUtils.beanFactory = beanFactory;
log.info("Bean Factory has been saved in a static variable SpringUtils !");
}
//場景 SystemService service = springUtils.getBean("SystemService")//這個是不是類似 注入 啊。因爲 @Service("SystemService") SystemServiceImpl上有這樣的註解。
}
SystemUtils 系統相關(有點多)
public class SystemUtils{
//常量--就一個日誌知道點.其他的幹啥的?其他的也是放到 session中 緩存起來。
public static final Logger log = LoggerFactory.getLogger(SystemUtils.class.getName());
public static final String SESSION_USER = "SESSION_USER ";
public static final String SESSION_INDUSTRY/ORG/CONFIG = "SESSION_INDUSTRY/ORG/CONFIG";
public static final String CACHE_CONFIG_LIST="CACHE_CONFIG_LIST";
public static final String APPLICATION_PERMISSION="APPLICATION_PERMISSION";
public static final String SESSION_DATA_BEAN="SESSION_DATA_BEAN";
public static final String SESSION_POSITION_REF_LIST="SESSION_POSITION_REF_LIST";
//ThreadLocal相關 ,涉及線程安全. set,get 這裏一樣的我就只寫一個
1:protected static final ThreadLocal<String > sessionId = new ThreadLocal<>();
public static final void setSessionId(String sessionId) throws Exception{ SystemUtils.sessionId.set(sessionId); }
public static final String getSessionId(){ return SystemUtils.sessionId.get(); }
2: protected static final ThreadLocal<HttpServletRequest> request= new ThreadLocal<>();
3:protected static final ThreadLocal<RequestContext> requestContext= new ThreadLocal<>();
public static final RequestContext getRequestContext(){
if(requestContext.get() == null) {
HttpServletRequest request = getHttpServletRequest();
requestContext.set(new RequestContext(request));
}
return requestContext.get();
}
4:protected static final ThreadLocal<CurrentConfigModel> currentConfigModel= new ThreadLocal<>();
//該get方法經常用 作用:獲取當前配置信息
public static final CurrentConfigModel getCurrentConfigModel() throws Exception{
CurrentConfigModel obj = getHttpServletRequest().getSession.getAttribute(SESSION_CONFIG);
if(obj == null ){
obj= new CurrentConfigModel();
getHttpServletRequest().getSession().setAttribute(SESSION_CONFIG,obj);
}
return obj;
}
//該set方法 作用爲 設置用戶緩存 存在 session 中
public static void setCurrentConfigModel(CurrentConfigModel config) throws Exception{
getHttpServletRequest().getSession().setAttribute(SESSION_CONFIG.config);
}
5:protected static final ThreadLocal<UserModel> userModel= new ThreadLocal<>();
//該get方法經常用 作用:獲取當前用戶信息
public static UserModel getUserModel() throws Exception{
if(getHttpServletRequest() == null ) return userModel.get();
if(getHttpServletRequest().getSession() == null ) return null;
Obejct obj = getHttpServletRequest().getSession.getAttribute(SESSION_USER);
return (UserModel)obj;
}
//該set方法 作用爲 設置用戶緩存 存在 session 中
public static void setUserModel(UserModel user) throws Exception{
log.info( String.format("%s == %s"),user.getLoginName(),user.getLoginPwd()) );
if(getHttpServletRequest() == null){userModel.set(user) ;return ;}//說明不是第一次登陸。
getHttpServletRequest().getSession().setAttribute(SESSION_USER,user);
}
//該 clear方法是爲了清除用戶緩存
public static void clearUserModel() throws Exception{
getHttpServletRequest().getSession().removeAttribute(SESSION_USER);
}
//6:protected static final ThreadLocal<SiebelDataBean> siebelDataBean= new ThreadLocal<>(); //get set 我就不寫了。
//11獲取行業信息 --這個也緩存到session中，但 沒有涉及線程安全。
//用戶信息涉及 ，行業信息不涉及。那我怎麼判斷？/是因爲用戶信息經常修改嗎？行業信息不經常變動，這個原因嗎？/
public static List<IndustryModel> getIndustryList() throws Exception{
return (List<IndustryModel>)getHttpServletRequest().getSession().getAtrribute(SESSION_INDUSTRY);
}
//設置行業信息緩存
public static void setIndustryList(List<IndustryModel> list) throws Exception{
getHttpServletRequest().getSession().setAttribute(SESSION_INDUSTRY,list);
}
//12獲取緩存列表 (ConfigModel:埋點信息 String value；值 String description ;描述，List<String> notKeys; extends BaseModel .說實話我第一次接觸埋點。)
public static final Map<String ,Object> cacheList = new RedisMap<String,Object>(SystemUtils.class);
public static List<ConfigModel> getConfigList() throws Exception{
return (List<ConfigModel>)cacheList.get(CACHE_CONFIG_LIST);
}
public static String getConfig(String key){
try{
for( ConfigModel config : getConfigList() ){
if(key.equals(config.getRowId())){ return config.getValue();}
}
}catch(Exception e ){e.printStackTrace();}
return null;
}
//設置緩存列表
public static void List<ConfigModel> setConfigList(List<ConfigModel> list) throws Exception{
cacheList.put(CACHE_CONFIG_LIST,list);
}
//13 獲取職位列表
public static List<String,String> getPositionRefList() throws Exception{
return (List<String,String>)getHttpServletRequest().getSession().getAttribute(SESSION_POSITION_REF_LIST);
}
public static List<String> getPositionRefStringList() throws Exception{
List<String> retlist = new LinkedList<>();
List<Map<String,String>> list = getPositionRefList();
if(list == null ) return retlist;
for( Map<String,String> map : list){ retlist.add(map.get("positionId"));}
return retlist;
}
//14:獲取國際化信息--一般properties用於獲取一般屬性配置文件，ResourceBundle用於獲取國際化屬性信息
public static final String getMessage(String code){
try{
return getMessages().get( String.format("error.code.%s",code) );//其實就是 error.code.xxxxxx
}catch(Exception e ){
return code;
}
}
public static final Map<String,String> getMessages() throws Exception{
//讀取國際化屬性配置文件
ResourceBundle resourceBundle = ResourceBundle.getBundle("message,message",getRequestContext.getLocale()); //師父說 這個是隨瀏覽器變化
//ResourceBundle resourceBundle = ResourceBundle.getBundle("message,message",Locale.getDefault()); //這個是 隨操作系統變化
Enumeration<String> keys = resourceBundle.getKeys();//獲取配置文件中所有key
Map<String ,String> retMap = new HashMap<>();//創建一個用來裝返回數據的map集合
while( keys.hasMoreElements() ){
String key = keys.nextElement(); //得到每一個key
String value = resourceBundle.getString(key); //得到每一個value
retMap.put(key,value);
}
return retMap;
}
}
這裏需要說明下那個 ResourceBundle resourceBundle = ResourceBundle.getBundle(“message.message”,getRequestContext.getLocale());
我先開始看不懂 message.message,項目下路徑爲：web層
src/main/resources /message/message_zh.properties message_ch.properties
我不明白爲什麼這樣可以掃描到這個文件？、而且我做了測試，確實掃描的是這個文件。
後來上網查看，才知道答案在這裏：
命名規則按照：資源名+語言國別.properties
ResourceBundle bundle = ResourceBundle.getBundle("res", new Locale("zh", "CN"));
1
**其中new Locale(“zh”, “CN”);這個對象就告訴了程序你的本地化信息，就拿這個來說吧：程序首先會去classpath下尋找res_zh_CN.properties;若不存在，那麼會去找res_zh.properties，若還是不存在，則會去尋找res.properties，要還是找不到的話，那麼就該拋異常了：MissingResourceException.**
參考：https://blog.csdn.net/haiyan0106/article/details/2257725