SpringBoot获取HttpServletRequest对象 SpringBoot实现任意位置获取HttpServletRequest对象
梁云亮 人气:0想了解SpringBoot实现任意位置获取HttpServletRequest对象的相关内容吗，梁云亮在本文为您仔细讲解SpringBoot获取HttpServletRequest对象的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：SpringBoot任意位置获取对象,获取HttpServletRequest对象，下面大家一起来学习吧。
任意位置获取HttpServletRequest对象
方法一
//获取RequestAttributes RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes(); //从获取RequestAttributes中获取HttpServletRequest的信息 HttpServletRequest request = (HttpServletRequest)requestAttributes.resolveReference(RequestAttributes.REFERENCE_REQUEST);
方法二
ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes(); HttpServletRequest request = attributes.getRequest();
HttpServletRequest只能读取一次的解决
业务逻辑，通过filter读取请求的request,获取token，并将token传递后面流程使用
BodyReaderHttpServletRequestWrapper：
public class BodyReaderHttpServletRequestWrapper extends HttpServletRequestWrapper {
private final byte[] body;
public BodyReaderHttpServletRequestWrapper(HttpServletRequest request) throws IOException {
super(request);
body = HttpHelper.getBodyString(request).getBytes(Charset.forName("UTF-8"));
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(getInputStream()));
}
@Override
public ServletInputStream getInputStream() throws IOException {
final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(body);
return new ServletInputStream() {
@Override
public int read() throws IOException {
return byteArrayInputStream.read();
}
@Override
public boolean isFinished() {
return false;
}
@Override
public boolean isReady() {
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
}
};
}
}
RepeatReadFilter：
/**
* 封装HttpServletRequest为可重复读取请求
**/
public class RepeatReadFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
// 防止流读取一次后就没有了, 所以需要将流继续写出去
ServletRequest requestWrapper = new BodyReaderHttpServletRequestWrapper(httpServletRequest);
//获取用户凭证
String token = httpServletRequest.getHeader(Constants.USER_TOKEN);
if(StringUtils.isBlank(token)){
token = httpServletRequest.getParameter(Constants.USER_TOKEN);
}
//=================获取json格式的token字段=========================
String body = HttpHelper.getBodyString(requestWrapper);
if (StringUtils.isNotBlank(body)) {
JSONObject jsonObject = JSONObject.parseObject(body);
Object obj = jsonObject.get("token");
if (null != obj) {
token = obj.toString();
}
}
requestWrapper.setAttribute(Constants.USER_TOKEN,token);
chain.doFilter(requestWrapper, response);
}
@Override
public void destroy() {
}
}
FilterConfig：
@Configuration
public class FilterConfig {
@Bean
public FilterRegistrationBean registFilter() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new RepeatReadFilter());
registration.addUrlPatterns("/app/*");
registration.setName("UrlFilter");
registration.setOrder(1);
return registration;
}
}
AuthorizationInterceptor：
@Component
public class AuthorizationInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
AuthIgnore annotation;
if(handler instanceof HandlerMethod) {
annotation = ((HandlerMethod) handler).getMethodAnnotation(AuthIgnore.class);
}else{
return true;
}
//如果有@AuthIgnore注解，则不验证token
if(annotation != null){
return true;
}
//获取用户凭证
String token = request.getHeader(Constants.USER_TOKEN);
if(StringUtils.isBlank(token)){
token = request.getParameter(Constants.USER_TOKEN);
}
if(StringUtils.isBlank(token)){
Object obj = request.getAttribute(Constants.USER_TOKEN);
if(null!=obj){
token=obj.toString();
}
}
//token凭证为空
if(StringUtils.isBlank(token)){
throw new AuthException(Constants.USER_TOKEN + "不能为空", HttpStatus.UNAUTHORIZED.value());
}
return true;
}
}
WebMvcConfig：
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private AuthorizationInterceptor authorizationInterceptor;
// @Autowired
// private LoginUserHandlerMethodArgumentResolver loginUserHandlerMethodArgumentResolver;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(authorizationInterceptor).addPathPatterns("/**");
super.addInterceptors(registry);
}
@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
//argumentResolvers.add(loginUserHandlerMethodArgumentResolver);
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
super.configureMessageConverters(converters);
}
@Override
public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
}
}
在filter中读取token，在interceptor中进行读取判断使用
HttpHelper：
public class HttpHelper {
/**
* 获取请求Body
*
* @param request
* @return
*/
public static String getBodyString(ServletRequest request) {
StringBuilder sb = new StringBuilder();
InputStream inputStream = null;
BufferedReader reader = null;
try {
inputStream = request.getInputStream();
reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("UTF-8")));
String line = "";
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
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