SpringBoot请求参数加密、响应参数解密

在Spring Boot中，可以通过自定义Filter来实现请求参数的加解密。以下是一个简单的例子，展示了如何在Spring Boot应用中实现请求参数的加密和响应参数的解密。

1. 创建一个自定义Filter来处理加解密：

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
 
public class EncryptionFilter implements Filter {
 
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // 初始化操作
    }
 
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        EncryptedRequestWrapper wrappedRequest = new EncryptedRequestWrapper(req);
        chain.doFilter(wrappedRequest, response);
    }
 
    @Override
    public void destroy() {
        // 销毁操作
    }
 
    private static class EncryptedRequestWrapper extends HttpServletRequestWrapper {
 
        private Map<String, String[]> decryptedParameters = new HashMap<>();
 
        public EncryptedRequestWrapper(HttpServletRequest request) {
            super(request);
            decryptParameters(request);
        }
 
        private void decryptParameters(HttpServletRequest request) {
            // 模拟解密操作
            // 解密request中的参数，并存储到decryptedParameters中
        }
 
        @Override
        public String getParameter(String name) {
            String[] values = getParameterValues(name);
            return values != null ? values[0] : null;
        }
 
        @Override
        public String[] getParameterValues(String name) {
            return decryptedParameters.get(name);
        }
 
        @Override
        public Map<String, String[]> getParameterMap() {
            return decryptedParameters;
        }
    }
}

2. 注册自定义Filter：

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
 
@Configuration
public class FilterConfig {
 
    @Bean
    public FilterRegistrationBean encryptionFilter() {
        FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        registrationBean.setFilter(new EncryptionFilter());
        registrationBean.addUrlPatterns("/*");
        registrationBean.setOrder(