方案一

AdviceAdapter+Interceptor

get使用拦截器校验，post请求使用

@ControllerAdvice

https://cloud.tencent.com/developer/article/1516443

package com.shendi.dolphin.common.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.RequestBodyAdviceAdapter;

import java.lang.reflect.Type;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


@ControllerAdvice
@Slf4j
public class MyRequestBodyAdviceAdapter extends RequestBodyAdviceAdapter {

    private static final Pattern FULL_CHARACTER = Pattern.compile("[^\\x00-\\xff]");

    @Override
    public boolean supports(MethodParameter methodParameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
        return true;
    }

    @Override
    public Object afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {

        if (body == null) {
            return true;
        }

        log.info("POST请求体：{}", body);
        if (StringUtils.isEmpty(body)) {
            return true;
        }

        Matcher matcher = FULL_CHARACTER.matcher(body.toString());
        Assert.isTrue(!matcher.find(), "请使用半角输入法输入,重新提交");
        return super.afterBodyRead(body, inputMessage, parameter, targetType, converterType);
    }
}
package com.shendi.dolphin.common.interceptor;
import com.shendi.dolphin.common.wrapper.BodyReaderWrapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.Assert;
import org.springframework.util.StreamUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


@Slf4j
public class CharacterInterceptor implements HandlerInterceptor {

    private static final Pattern FULL_CHARACTER = Pattern.compile("[^\\x00-\\xff]");

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("-----------------------进入字符编码拦截器--------------------------");

//        String contentType = request.getContentType();
        String method = request.getMethod();
        if ("GET".equals(method)) {

            //获取请求参数
            String queryString = request.getQueryString();
            log.info("GET请求参数:{}", queryString);
            if (StringUtils.isEmpty(queryString)) {
                return true;
            }
            Matcher matcher = FULL_CHARACTER.matcher(queryString);
            Assert.isTrue(!matcher.find(), "请使用半角输入法输入,重新提交");

        } 
        return true;
    }
}

方案二

Wrapper+Filter+Interceptor

https://blog.csdn.net/Zong_0915/article/details/126632272?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EYuanLiJiHua%7EPosition-1-126632272-blog-88559563.pc_relevant_multi_platform_whitelistv4&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EYuanLiJiHua%7EPosition-1-126632272-blog-88559563.pc_relevant_multi_platform_whitelistv4&utm_relevant_index=1