SpringBoot通过AOP与注解实现入参校验 GET \ POST
问题
request.getParameterMap() 方法无法获取POST方法中的参数。
解决方法
POST无法通过getParameter获取到参数，请求体只能通过getInputStream或者是getReader来获取到。通过流的方式获取到后，通过FastJson里面的方法将其转成Map返回。
在使用@RequestBody的时候，它会通过流的方式将数据读出来(getReader或getInputStream)，而这种方式读取数据只能读取一次，不能读取第二次。
这里我解决这一问题的方法是先将RequestBody保存为一个byte数组，然后继承HttpServletRequestWrapper类覆盖getReader()和getInputStream()方法，使流从保存的byte数组读取。
继承HttpServletRequestWrapper类重写getInputStream和getReader方法，每次读的时候读取保存在requestBody中的数据。
完整代码
SysLog
@Target(ElementType.METHOD) //该注解应用于方法
@Retention(RetentionPolicy.RUNTIME) //在vm运行期间保留注解
@Documented //将注解包含在javadoc中
public @interface SysLog {
String value() default ""; // 接口名称
}SysLogAspect
/**
* 系统日志，切面处理类
* 处理@SysLog注解
*/
@Aspect
@Component
public class SysLogAspect {
private static Logger logger = LoggerFactory.getLogger(SysLogAspect.class);
@Resource
private SysLogMapper sysLogMapper;
/**
* SpringBoot获取当前环境代码,Spring获取当前环境代码
*/
@Value("${spring.profiles.active}")
private String profiles;
@Pointcut("@annotation(com.sxmingyun.liandong.common.annotation.SysLog)")
public void logPointCut() {
}
@Around("logPointCut()")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
long beginTime = System.currentTimeMillis();
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
SysLogEntity sysLog = new SysLogEntity();
SysLog syslog = method.getAnnotation(SysLog.class);
if (syslog != null) {
//注解上的描述
String value = syslog.value();
logger.info("=====> {} {}", value, request.getRequestURI());
sysLog.setOperation(value);
}
//请求的方法名
String className = joinPoint.getTarget().getClass().getName();
String methodName = signature.getName();
sysLog.setMethod(className + "." + methodName + "()");
sysLog.setIp(IPUtils.getIp(request));
sysLog.setCreateDate(new Date());
sysLog.setProfiles(profiles);
//请求的参数
Object[] args = joinPoint.getArgs();
JSONObject paramObj = JSONObject.parseObject(JSON.toJSONString(getRequestParams(request)));
String params = paramObj.isEmpty() ? "" : JSONObject.toJSONString(paramObj);
sysLog.setParams(params);
sysLog.setRpid(StringUtils.isNotBlank(paramObj.getString("rpid")) ? paramObj.getString("rpid") : "");
logger.info("==> 参数：{}", params);
// 返回内容
Object result = joinPoint.proceed(args);
String results = JSONObject.toJSONString(result);
JSONObject res = JSONObject.parseObject(results);
sysLog.setResult(results.replaceAll("\\s*|\t|\r|\n", ""));
sysLog.setCode(res.getString("retcode"));
//执行时长(毫秒)
long time = System.currentTimeMillis() - beginTime;
sysLog.setTime(time);
//保存系统日志
StopWatch watch = StopWatch.create("log");
watch.start();
try {
sysLogMapper.insertSysLog(sysLog);
} catch (Exception e) {
logger.error("日志记录失败：{}", e.getMessage());
}
watch.stop();
logger.info("insert time: {}", watch.getTotalTimeMillis());
logger.info("==> 返回：code={}, logId={}", res.getLongValue("retcode"), sysLog.getId());
return result;
}
/**
* 获取请求参数
*
* @param request
* @return
* @throws IOException
*/
public Map<String, String> getRequestParams(HttpServletRequest request) throws IOException {
Map<String, String> resultParam = null;
if (request.getMethod().equalsIgnoreCase("POST")) {
StringBuffer data = new StringBuffer();
String line = null;
BufferedReader reader = request.getReader();
while (null != (line = reader.readLine())) {
data.append(line);
}
if (data.length() != 0) {
resultParam = JSONObject.parseObject(data.toString(), new TypeReference<Map<String, String>>() {
});
}
} else if (request.getMethod().equalsIgnoreCase("GET")) {
resultParam = request.getParameterMap().entrySet().stream()
.collect(Collectors.toMap(i -> i.getKey(), e -> Arrays.stream(e.getValue())
.collect(Collectors.joining(","))));
}
return resultParam != null ? resultParam : new HashMap();
}
}CustomRequestWrapper
/**
* 继承HttpServletRequestWrapper类重写getInputStream和getReader方法，每次读的时候读取保存在requestBody中的数据
*
*/
public class CustomRequestWrapper extends HttpServletRequestWrapper {
private byte[] requestBody;
private HttpServletRequest request;
public CustomRequestWrapper(HttpServletRequest request) {
super(request);
this.request = request;
}
@Override
public ServletInputStream getInputStream() throws IOException {
if (this.requestBody == null) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOUtils.copy(request.getInputStream(), bos);
this.requestBody = bos.toByteArray();
}
ByteArrayInputStream bis = new ByteArrayInputStream(requestBody);
return new ServletInputStream() {
@Override
public boolean isFinished() {
return false;
}
@Override
public boolean isReady() {
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
}
@Override
public int read() throws IOException {
return bis.read();
}
};
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(this.getInputStream()));
}
}CustomFilter
@Component
@WebFilter(filterName = "channelFilter", urlPatterns = {"/*"})
public class CustomFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
ServletRequest requestWrapper = null;
if (request instanceof HttpServletRequest) {
requestWrapper = new CustomRequestWrapper((HttpServletRequest) request);
}
if (requestWrapper == null) {
filterChain.doFilter(request, servletResponse);
} else {
filterChain.doFilter(requestWrapper, servletResponse);
}
}
}参考文章：
https://www.jb51.net/article/248246.htm