原因是

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  @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    
        /** cms静态资源预览文件路径 */
        registry.addResourceHandler(ContentCoreConsts.RESOURCE_PREVIEW_PREFIX + "**")
                .addResourceLocations("file:" + getResourceRoot());
     
    }
    

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解决依赖版本问题和冲突：

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package com.ruoyi.common.i18n;

import java.lang.reflect.Field;
import java.util.List;
import java.util.Locale;
import java.util.Objects;

import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.util.PropertyPlaceholderHelper;

import com.ruoyi.common.utils.ReflectASMUtils;
import com.ruoyi.common.utils.SpringUtils;
import com.ruoyi.common.utils.StringUtils;

public class I18nUtils {

    private final static MessageSource messageSource = SpringUtils
            .getBean(AbstractApplicationContext.MESSAGE_SOURCE_BEAN_NAME);

    private static final PropertyPlaceholderHelper FieldPlaceholderHelper = new PropertyPlaceholderHelper("#{", "}");

    private static final PropertyPlaceholderHelper PlaceholderHelper = new PropertyPlaceholderHelper("{", "}", ":",
            true);

    public static void replaceI18nFields(List<?> objs) {
        replaceI18nFields(objs, LocaleContextHolder.getLocale());
    }

    /**
     * 将列表所有对象中@I18nField标注的字段替换为指定国际化语言值
     * 
     * @param objs
     * @param locale
     */
    public static void replaceI18nFields(List<?> objs, Locale locale) {
        if (Objects.isNull(objs)) {
            return;
        }
        objs.forEach(obj -> replaceI18nFields(obj, locale));
    }

    public static void replaceI18nFields(Object obj) {
        replaceI18nFields(obj, LocaleContextHolder.getLocale());
    }

    /**
     * 将对象有@I18nField标注的字段替换为指定国际化语言值
     * 
     * @param obj
     * @param locale
     */
    public static void replaceI18nFields(Object obj, Locale locale) {
        if (Objects.isNull(obj)) {
            return;
        }
        Field[] declaredFields = obj.getClass().getDeclaredFields();
        for (Field field : declaredFields) {
            if (field.isAnnotationPresent(I18nField.class)) {
                I18nField i18nField = field.getAnnotation(I18nField.class);
                try {
                    if (StringUtils.isNotEmpty(i18nField.value())) {
                        String langStr = i18nField.value();
                        // 先将#{fieldName}占位替换为obj字段值
                        langStr = FieldPlaceholderHelper.replacePlaceholders(langStr, placehoderName -> {
                            Object fieldV = ReflectASMUtils.invokeGetter(obj, placehoderName);
                            return Objects.nonNull(fieldV) ? fieldV.toString() : StringUtils.EMPTY;
                        });
                        String langValue = get(langStr, locale);
                        ReflectASMUtils.invokeSetter(obj, field.getName(), langValue);
                    } else {
                        Object fieldV = ReflectASMUtils.invokeGetter(obj, field.getName());
                        if (Objects.nonNull(fieldV)) {
                            String langKey = fieldV.toString();
                            String langValue = get(langKey, locale);
                            ReflectASMUtils.invokeSetter(obj, field.getName(), langValue);
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 获取国际化键名对应的当前默认语言值
     * 
     * @param str
     * @return
     */
    public static String get(String str) {
        return get(str, LocaleContextHolder.getLocale());
    }

    /**
     * 获取国际化键名指定的语言值
     * 
     * @param str
     * @param locale
     * @param args
     * @return
     */
    public static String get(String str, Locale locale, Object... args) {
        if (StringUtils.isEmpty(str)) {
            return str;
        }
        return PlaceholderHelper.replacePlaceholders(str, langKey -> messageSource.getMessage(langKey, args, locale));
    }
}

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Gradle本地仓库第三方Jar包存放位置

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