SpringBoot拦截Request修改里面参数内容(HttpServletRequestWrapper)

通过包装request,实际调用的是包装之后的request对象

• 新内容
  借鉴这位童鞋https://blog.csdn.net/asd1098626303/article/details/82149129参考
  已级@weixin_36931308这位童鞋提醒
  代码完整实现:
  项目目录:
  

1.主类WebDemoApplication

@SpringBootApplication
@ServletComponentScan
public class WebDemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(WebDemoApplication.class, args);
    }
}

2.ControllerFileter

@WebFilter(urlPatterns = "/*")
public class ControllerFileter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        filterChain.doFilter(new TokenRequestWrapper((HttpServletRequest) servletRequest), servletResponse);
    }
}

3.TokenRequestWrapper

public class TokenRequestWrapper extends HttpServletRequestWrapper {
    TokenRequestWrapper(HttpServletRequest request) {
        super(request);
    }
    /**
     * 修改此方法主要是因为当RequestMapper中的参数为pojo类型时，
     * 会通过此方法获取所有的请求参数并进行遍历，对pojo属性赋值
     * @return
     */
    @Override
    public Enumeration<String> getParameterNames() {
        Enumeration<String> enumeration = super.getParameterNames();
        ArrayList<String> list = Collections.list(enumeration);
        //当有token字段时动态的添加uid字段
        if (list.contains("token")){
            list.add("uid");
            return Collections.enumeration(list);
        }else {
            return super.getParameterNames();
        }
    }
    @Override
    public String[] getParameterValues(String name) {
        if ("uid".equals(name)){
            return new String[]{"1","2","3"};
        }
        return super.getParameterValues(name);
    }
}

4.User

@Data
public class User {
    private String uid;
    private String name;
}

5.TestController

@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    HttpServletRequest httpServletRequest;

    @GetMapping("/param")
    public Object param(String uid,String name){
        return uid;
    }


    @GetMapping("/bean")
    private Object gets(User user){
        return user;
    }
}

6.接口

/test/param?token=213&name=231

/test/bean?token=213&name=231

转后结果:
参数藏起来了

以下内容待研究当时怎么写的

=========================================================

• 创建自定义包装类

public class MyRequestWrapper extends HttpServletRequestWrapper {
    public MyRequestWrapper(HttpServletRequest request) {
        super(request);
    }

    @Override
    public String getParameter(String name) {
	    // 设置参数返回逻辑
        System.out.println(super.getParameter(name));
        return "yangshisheng";
    }
}

• Filter将包装Request传出

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    filterChain.doFilter(new MyRequestWrapper((HttpServletRequest) servletRequest), servletResponse);
}

之后controller中使用的是包装后的request对象.

===============================================================