vue post请求问题请各位看一下

我想取出 request playload 的值

 private String getStringFromStream(HttpServletRequest req) {
        HttpServletRequestWrapper hsrw = new HttpServletRequestWrapper (req);
        ServletInputStream is;
        try {
            is = hsrw.getInputStream();
            int nRead = 1;
            int nTotalRead = 0;
            byte[] bytes = new byte[10240];
            while (nRead > 0) {
                nRead = is.read(bytes, nTotalRead, bytes.length - nTotalRead);//这里报错了 不知道怎么回事？
                if (nRead > 0)
                    nTotalRead = nTotalRead + nRead;
            }
            String str = new String(bytes, 0, nTotalRead, "utf-8");
            return str;
        } catch (IOException e) {
            e.printStackTrace();
            return "";
        }
    }

org.apache.catalina.connector.ClientAbortException: java.io.EOFException
    at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:322)
    at org.apache.catalina.connector.InputBuffer.checkByteBufferEof(InputBuffer.java:600)
    at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:340)
    at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:132)
    at com.chenli.main.security.oauth2.token.TokenLoginFilter.getStringFromStream(TokenLoginFilter.java:69)
    at com.chenli.main.security.oauth2.token.TokenLoginFilter.attemptAuthentication(TokenLoginFilter.java:40)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:222)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:103)

HttpServletRequest获取参数(重要)
1　HttpServletRequest获取参数方法
可以使用HttpServletRequest获取客户端的请求参数，相关方法如下：

String getParameter(String name)：通过指定名称获取参数值；
String[] getParameterValues(String name)：通过指定名称获取参数值数组，有可能一个名字对应多个值，例如表单中的多个复选框使用相同的name时；
Enumeration getParameterNames()：获取所有参数的名字；
Map getParameterMap()：获取所有参数对应的Map，其中key为参数名，value为参数值。