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SpringBoot项目中遇到的过期方法/注解替换(持续更新)

1.@NotEmpty注解废弃

spring-boot-starter-web依赖中中包含了hibernate-validator

SpringBoot项目中遇到的过期方法/注解替换(持续更新)插图
image.png

使用org.hibernate.validator.constraints.NotEmpty时发现已经废弃
对应的文档说明http://docs.jboss.org/hibernate/validator/6.0/api/index.html?org/hibernate/validator/constraints/NotEmpty.html
需要改用javax.validation.constraints.NotEmpty

源码对比

org.hibernate.validator.constraints.NotEmpty注解源码

@Documented
@Constraint(
    validatedBy = {}
)
@SupportedValidationTarget({ValidationTarget.ANNOTATED_ELEMENT})
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
@Retention(RetentionPolicy.RUNTIME)
@Repeatable(NotEmpty.List.class)
@ReportAsSingleViolation
@NotNull
@Size(
    min = 1
)
@Deprecated
public @interface NotEmpty {
    String message() default "{org.hibernate.validator.constraints.NotEmpty.message}";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    @Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
    @Retention(RetentionPolicy.RUNTIME)
    @Documented
    public @interface List {
        NotEmpty[] value();
    }
}

javax.validation.constraints.NotEmpty注解源码

@Documented
@Constraint(
    validatedBy = {}
)
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
@Retention(RetentionPolicy.RUNTIME)
@Repeatable(NotEmpty.List.class)
public @interface NotEmpty {
    String message() default "{javax.validation.constraints.NotEmpty.message}";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    @Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
    @Retention(RetentionPolicy.RUNTIME)
    @Documented
    public @interface List {
        NotEmpty[] value();
    }
}

Hibernate验证程序的已弃用API的更新列表
https://docs.jboss.org/hibernate/stable/validator/api/index.html?deprecated-list.html

2.java.net.URLEncoder中encode(String s)方法过期

废弃的原因是字符串可能因平台默认编码不同而不同
需要改用encode(String s, String enc)
s:要转换的 String
enc:所支持的字符编码名称

源码对比

encode(String s)方法源码,deprecated中官方说明了废弃原因

    /**
     * @deprecated The resulting string may vary depending on the platform's
     *             default encoding. Instead, use the encode(String,String)
     *             method to specify the encoding.
     */
    @Deprecated
    public static String encode(String s) {
        String str = null;
        try {
            str = encode(s, dfltEncName);
        } catch (UnsupportedEncodingException e) {
            // The system should always have the platform default
        }
        return str;
    }

encode(String s, String enc)方法源码

public static String encode(String s, String enc) throws UnsupportedEncodingException {
        boolean needToChange = false;
        StringBuffer out = new StringBuffer(s.length());
        Charset charset;
        CharArrayWriter charArrayWriter = new CharArrayWriter();

        if (enc == null)
            throw new NullPointerException("charsetName");
        try {
            charset = Charset.forName(enc);
        } catch (IllegalCharsetNameException e) {
            throw new UnsupportedEncodingException(enc);
        } catch (UnsupportedCharsetException e) {
            throw new UnsupportedEncodingException(enc);
        }

        for (int i = 0; i < s.length();) {
            int c = (int) s.charAt(i);
            if (dontNeedEncoding.get(c)) {
                if (c == ' ') {
                    c = '+';
                    needToChange = true;
                }
                out.append((char)c);
                i++;
            } else {
                // convert to external encoding before hex conversion
                do {
                    charArrayWriter.write(c);
                    /*
                     * If this character represents the start of a Unicode
                     * surrogate pair, then pass in two characters. It's not
                     * clear what should be done if a bytes reserved in the
                     * surrogate pairs range occurs outside of a legal
                     * surrogate pair. For now, just treat it as if it were
                     * any other character.
                     */
                    if (c >= 0xD800 && c <= 0xDBFF) {
                        if ( (i+1) < s.length()) {
                            int d = (int) s.charAt(i+1);
                            if (d >= 0xDC00 && d <= 0xDFFF) {
                                charArrayWriter.write(d);
                                i++;
                            }
                        }
                    }
                    i++;
                } while (i < s.length() && !dontNeedEncoding.get((c = (int) s.charAt(i))));

                charArrayWriter.flush();
                String str = new String(charArrayWriter.toCharArray());
                byte[] ba = str.getBytes(charset);
                for (int j = 0; j < ba.length; j++) {
                    out.append('%');
                    char ch = Character.forDigit((ba[j] >> 4) & 0xF, 16);
                    // converting to use uppercase letter as part of
                    // the hex value if ch is a letter.
                    if (Character.isLetter(ch)) {
                        ch -= caseDiff;
                    }
                    out.append(ch);
                    ch = Character.forDigit(ba[j] & 0xF, 16);
                    if (Character.isLetter(ch)) {
                        ch -= caseDiff;
                    }
                    out.append(ch);
                }
                charArrayWriter.reset();
                needToChange = true;
            }
        }

        return (needToChange? out.toString() : s);
    }

3.配置类WebMvcConfigurerAdapter过期

WebMvcConfigurerAdapter配置类其实是Spring内部的一种配置方式,采用JavaBean的形式来代替传统的xml配置文件形式进行针对框架个性化定制
SpringBoot2.X,Spring 5.0 以后WebMvcConfigurerAdapter会取消掉

替代方法:实现WebMvcConfigurer接口
@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(authenticationInterceptor())
                .addPathPatterns("/**");   
    }
}
WebMvcConfigurerAdapter抽象类源码
@Deprecated
public abstract class WebMvcConfigurerAdapter implements WebMvcConfigurer {
    public WebMvcConfigurerAdapter() {
    }

    public void configurePathMatch(PathMatchConfigurer configurer) {
    }

    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
    }

    public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
    }

    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
    }

    public void addFormatters(FormatterRegistry registry) {
    }

    public void addInterceptors(InterceptorRegistry registry) {
    }

    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    }

    public void addCorsMappings(CorsRegistry registry) {
    }

    public void addViewControllers(ViewControllerRegistry registry) {
    }

    public void configureViewResolvers(ViewResolverRegistry registry) {
    }

    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
    }

    public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {
    }

    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
    }

    public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
    }

    @Nullable
    public Validator getValidator() {
        return null;
    }

    @Nullable
    public MessageCodesResolver getMessageCodesResolver() {
        return null;
    }
}
WebMvcConfigurer接口源码
public interface WebMvcConfigurer {
    default void configurePathMatch(PathMatchConfigurer configurer) {
    }

    default void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
    }

    default void configureAsyncSupport(AsyncSupportConfigurer configurer) {
    }

    default void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
    }

    default void addFormatters(FormatterRegistry registry) {
    }

    default void addInterceptors(InterceptorRegistry registry) {
    }

    default void addResourceHandlers(ResourceHandlerRegistry registry) {
    }

    default void addCorsMappings(CorsRegistry registry) {
    }

    default void addViewControllers(ViewControllerRegistry registry) {
    }

    default void configureViewResolvers(ViewResolverRegistry registry) {
    }

    default void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
    }

    default void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> handlers) {
    }

    default void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    default void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    default void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
    }

    default void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
    }

    @Nullable
    default Validator getValidator() {
        return null;
    }

    @Nullable
    default MessageCodesResolver getMessageCodesResolver() {
        return null;
    }
}
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