java.lang.StackOverflowError
at sun.nio.cs.UTF_8.updatePositions(UTF_8.java:58)
at sun.nio.cs.UTF_8$Encoder.encodeArrayLoop(UTF_8.java:392)
at sun.nio.cs.UTF_8$Encoder.encodeLoop(UTF_8.java:447)
at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:544)
at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:252)
at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:106)
at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:94)
at java.io.OutputStreamWriter.write(OutputStreamWriter.java:177)
at org.apache.tomcat.util.buf.C2BConverter.convert(C2BConverter.java:99)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:425)
at org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:129)
at java.io.PrintWriter.append(PrintWriter.java:1019)
at java.io.PrintWriter.append(PrintWriter.java:35)
at org.nutz.json.impl.JsonRenderImpl.string2Json(JsonRenderImpl.java:334)
at org.nutz.json.impl.JsonRenderImpl.appendName(JsonRenderImpl.java:146)
at org.nutz.json.impl.JsonRenderImpl.appendPair(JsonRenderImpl.java:165)
at org.nutz.json.impl.JsonRenderImpl.writeItem(JsonRenderImpl.java:313)
at org.nutz.json.impl.JsonRenderImpl.map2Json(JsonRenderImpl.java:221)
at org.nutz.json.impl.JsonRenderImpl.render(JsonRenderImpl.java:115)
at org.nutz.json.impl.JsonRenderImpl.appendPair(JsonRenderImpl.java:167)
at org.nutz.json.impl.JsonRenderImpl.writeItem(JsonRenderImpl.java:313)
at org.nutz.json.impl.JsonRenderImpl.pojo2Json(JsonRenderImpl.java:306)
at org.nutz.json.impl.JsonRenderImpl.render(JsonRenderImpl.java:128)
List<Object> dataList = new ArrayList<Object>();
dataList.add(user);
dataList.add(us);
将这个list转成json的时候就出错了...