Java|Java NegativeArraySizeException异常解决方案 JavaNegativeArraySizeException异常解

问题描述：服务器接收后台返回的报文时，提示java.lang.NegativeArraySizeException
分析：这种异常返回的原因，一般情况下没有报文提示为返回空报文，初步分析是响应报文流长度出了问题
百度一下类似的情况：https://stackoverflow.com/questions/11207897/negative-array-size-exception
节选部分内容：

try{connection = (HttpConnection)Connector.open("http://someurl.xml",Connector.READ_WRITE); URLEncodedPostData postData = https://www.it610.com/article/new URLEncodedPostData(URLEncodedPostData.DEFAULT_CHARSET, false); postData.append("username", "loginapi"); postData.append("password", "myapilogin"); postData.append("term", word); connection.setRequestMethod(HttpConnection.POST); connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); connection.setRequestProperty("User-Agent","Profile/MIDP-2.0 Configuration/CLDC-1.0"); requestOut = connection.openOutputStream(); requestOut.write(postData.getBytes()); String contentType = connection.getHeaderField("Content-type"); detailIn = connection.openInputStream(); int length = (int) connection.getLength(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); if(length > 0){//这里长度没有判定的情况下，byte array长度若为-1会产生错误byte info[] = new byte[length]; int bytesRead = detailIn.read(info); while(bytesRead > 0) {baos.write(info, 0, bytesRead); bytesRead = detailIn.read(info); }baos.close(); connection.close(); requestSuceeded(baos.toByteArray(), contentType); detailIn.read(info); }else{System.out.println("Negative array size"); }requestOut.close(); detailIn.close(); connection.close(); }

结论：HTTP服务器在返回响应报文的时候，没有进行content.length长度判断，按照常规流程响应了错误长度的报文，导致了接收方报文长度异常
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