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最近突然发现自己的系统在输出字符串的时候出现下标越界的错误，如下：
java.lang.ArrayIndexOutOfBoundsException: 16384
at com.caucho.vfs.i18n.UTF8Writer.write(UTF8Writer.java:143)
at com.caucho.server.connection.ToByteResponseStream.flushCharBuffer(ToByteResponseStream.java:476)
at com.caucho.server.connection.ToByteResponseStream.nextCharBuffer(ToByteResponseStream.java:461)
at com.caucho.server.connection.ResponseWriter.write(ResponseWriter.java:144)
at com.caucho.vfs.AbstractPrintWriter.print(AbstractPrintWriter.java:210)
at cn.joy.action.BaseAction.outPrint(BaseAction.java:207)
at cn.joy.action.CommentsAction.commentsList(CommentsAction.java:70)
跟踪代码发现输出字符串的时候用的PrintWriter 对的print方法
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/html;charset=utf-8");
PrintWriter out = null;
try {
out = response.getWriter();
} catch (IOException e) {
}
String result = message;
if (out != null) {
out.print(result);
out.flush();
out.close();
} 最后测试发现当web服务器为tomcat的时候该问题不会出现，所以自己推断该问题与不同web服务器对PrintWriter的实现不同有关系，所以最后采用直接输出字节流的形式解决该问题：
HttpServletResponse response = ServletActionContext.getResponse();
//response.setContentType("text/html;charset=utf-8");
response.setContentType("application/json;charset=utf-8");
ServletOutputStream out = null;
try {
//out = response.getWriter();
response.setCharacterEncoding("utf-8");
out = response.getOutputStream();
if (out != null){
out.write(message.getBytes("utf-8"));
out.flush();
}
} catch (Exception e) {
log.error(e.getMessage(), e);
}finally{
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
log.error(e.getMessage(), e);
}
}版权声明：本文为博主原创文章，未经博主允许不得转载。
ArrayIndexOutOfBoundsException: 16384
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原文地址：http://blog.csdn.net/ypb137154098/article/details/48136089
