学习目标 1. 掌握 Java 数组的概念 2. 学会一维数组和二维数组的使用；认识 Arrays 类，掌握操 作数组相关方法 3. 掌握 Java 字符串的概念，字符串与数组的关系；学会 String 类常用字符串操作方法 大纲 数组的概念 一维数组 二维数组 字符串 大纲 数组的概念 一维数组 二维数组 字符串 大纲 数组的概念 一维数组 二维数组 字符串 接下来… 数组的概念 ▶ 字符串是用一对双引号括起来的字符序列。Java 语言中， 字符串常量或变量均用类实现。 ▶ String 对象是不可变的。String 类每一个看起来会修改 String 值的方法，实际上都创建了一个新的对象，以包含修 改后的字符串内容。 1 String s = new String("hello java"); 2 s.toUpperCase(); 3 System.out.println(s); println(s); 大纲 数组的概念 一维数组 二维数组 字符串 理解 Java 字符串 CODE ± String.java Part 1 1 public final class String 2 implements java.io.Serializable, Comparable<String>, CharSequence { //1 3 /** The value is used for

2、ini 配置文件指定自定义 Realm 实现(shiro-realm.ini) String getName(); //返回一个唯一的 Realm 名字 boolean supports(AuthenticationToken token); //判断此 Realm 是否支持此 Token AuthenticationException; //根据 Token 获取认证信息 public class MyRealm1 implements Realm { @Override public String getName() { return "myrealm1"; } @Override public boolean supports(AuthenticationToken en token) throws AuthenticationException { String username = (String)token.getPrincipal(); //得到用户名 String password = new String((char[])token.getCredentials()); //得到密码 if(

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Null and Empty String Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using register(Class…) . . . . . . . . . . . . . . . 148 Enabling Component Scanning with scan(String…) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Support for Web Applications here --> ① The id attribute is a string that identifies the individual bean definition. 4 ② The class attribute defines the type of the

. . . . . . . 26 3.5.1 字符串变量的创建 . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.5.2 String 类的常用方法 . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.5.3 理解 Java 字符串 . . . . . . . 个 Java 源文件 HelloWorld.java，文件命名必须与类名相同。 1 public class HelloWorld { 2 public static void main(String[] args) { 3 System.out.println(”Hi, Java!”); 4 } 5 } . . . . . . . . . . . . . . . . . . . . 字符声明用单引号表示单个字符。 • 字符型数据可以转化为整型。 示例代码：字符数据类型示例 1 public class CharDemo { 2 public static void main(String[] args) { 3 char a = ’J’; 4 char b=’Java’; //会报错 5 } 6 } 1建议搜索理解什么是字符集和字符编码规则。 . . . . . .

method for accessing form data: Java MonoString, String>> getFormData(); Kotlin suspend fun getFormData(): MultiValueMap<String, String> The DefaultServerWebExchange uses the configured HttpMessageReader MonoString, Part>> getMultipartData(); Kotlin suspend fun getMultipartData(): MultiValueMap<String, Part> The DefaultServerWebExchange uses the configured HttpMessageReaderString, Part>> more on this topic. The spring-core module provides byte[], ByteBuffer, DataBuffer, Resource, and String encoder and decoder implementations. The spring-web module provides Jackson JSON, Jackson Smile

new Class[] { App1Config.class }; } @Override protected String[] getServletMappings() { return new String[] { "/app1/*" }; } } Kotlin class MyWebAppInitializer : AbstractA return arrayOf(App1Config::class.java) } override fun getServletMappings(): Array<String> { return arrayOf("/app1/*") } }  If an application context hierarchy is not required to handlers, to HTML error views, or other targets. See Exceptions. ViewResolver Resolve logical String-based view names returned from a handler to an actual View with which to render to the response

Collections Collection merging Limitations of collection merging Strongly-typed collection Null and empty string values XML shortcut with the p-namespace XML shortcut with the c-namespace Compound property names the container programmatically using register(Class… ) Enabling component scanning with scan(String… ) Support for web applications with AnnotationConfigWebApplicationContext Using the @Bean annotation public @interface ContextConfiguration { @AliasFor("locations") String[] value() default {}; @AliasFor("value") String[] locations() default {}; // ... } Similarly, composed annotations

Collections Collection merging Limitations of collection merging Strongly-typed collection Null and empty string values XML shortcut with the p-namespace XML shortcut with the c-namespace Compound property names Building the container programmatically using register(Class… ) Enabling component scanning with scan(String… ) Support for web applications with AnnotationConfigWebApplicationContext Using the @Bean annotation public @interface ContextConfiguration { @AliasFor("locations") String[] value() default {}; @AliasFor("value") String[] locations() default {}; // ... } Similarly, composed annotations

wicket-util wicket-util Contains general-purpose utility classes for functional areas such as I/O, lang, string manipulation, security, etc… None 6 wicket-bean-validation Provides support for JSR 303 standard wicket.markup.html.basic.Label is the simplest component shipped with Wicket. It just inserts a string (the second argument of its constructor) inside the corresponding HTML tag. Just like any other Label replaces the original content of its tag (in our example [Label’s message goes here]) with the string passed as value (Hello WicketWorld! in our example) 11  If we specify a wicket:id attribute for

wicket-util wicket-util Contains general-purpose utility classes for functional areas such as I/O, lang, string manipulation, security, etc… None 7 wicket-datetime Contains special purpose components designed wicket.markup.html.basic.Label is the simplest component shipped with Wicket. It just inserts a string (the second argument of its constructor) inside the corresponding HTML tag. Just like any other (in our example _ _Label&.pdf ) with the string passed as value (_Hello WicketWorld! in our example).  If we specify a wicket:id attribute