springBoot实现脏话屏蔽功能

Posted 2021-06-16 蜜桃婷婷酱

springBoot实现脏话屏蔽功能(简易版)

有的时候在项目开发中,遇到用到对聊天,留言等文字进行扫描判断是否可以正常显示,也就是脏话屏蔽,举个例子:我打LOL的时候喷人的时候系统就不让我输出或者替换成星号,今天我们也做一个简易版的脏话屏蔽功能

1.写一个脏话屏蔽工具类

import org.springframework.stereotype.Component;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@Component
// 过滤路径，过滤器名称
@WebFilter(urlPatterns = "/*", filterName = "testFilter")
public class TestFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
    // 过滤
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {
        // 获取request
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        // 获取response
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        // 创建脏话过滤规则
        DirtyWordsHttpServletRequest dirtyWordsHttpServletRequest = new DirtyWordsHttpServletRequest(request);
        // 执行
        filterChain.doFilter(dirtyWordsHttpServletRequest, response);
    }
    @Override
    public void destroy() {
    }
    // 内部类脏话过滤规则
    class DirtyWordsHttpServletRequest extends HttpServletRequestWrapper {
        // 脏话字典、可以直接搜索脏话字典，然后通过io流进行读取和过滤
        private String[] words = {"傻", "滚", "死"};
        // 构造方法
        public DirtyWordsHttpServletRequest(HttpServletRequest request) {
            super(request);
        }
        // 重写getParameter方法
        @Override
        public String getParameter(String name) {
            // 获取传来的参数值
            String value = super.getParameter(name);
            // 判断
            if (value == null) return "没有值";
            // 执行脏话转换
            for (String dword : words) {
                if (value.contains(dword)) value = value.replace(dword, "**");
            }
            // 返回过滤有的值
            return value;
        }
    }
}

2.在启动类开启注解注入bean全盘扫描脏话

@ServletComponentScan("com.wyh.unit.TestFilter")//开启脏话过滤
@org.springframework.boot.autoconfigure.SpringBootApplication
public class SpringBootApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootApplication.class, args);
    }
}

3.写一个方法进行测试

@RequestMapping("/zanghua")
    @ResponseBody
    public String test(HttpServletRequest request) {
        return request.getParameter("info");
    }

4.查看效果

总结:其实还是比较简单的,不过我们这个就是简易版的,复杂一些的设计大量繁琐的算法推理,大家有什么补充的欢迎下面留言,晚安！