There is a cycle in the hierarchy解决办法
http://www.diybl.com/course/1_web/javascript/jsjs/20090415/165099.html
property 'delegate' has no getter method异常参考:http://panyongzheng.iteye.com/blog/1492278
解决办法
1.设置JSON-LIB让其过滤掉引起循环的字段。这个比较能解决问题，第2种方式只排除一个类，但是Hibernate会用到很多类，很难排除所有。
JsonConfig config = new JsonConfig(); config.setIgnoreDefaultExcludes(false); config.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT); config.registerJsonValueProcessor(Date.class, new DateJsonValueProcessor("yyyy-MM-dd")); config.setExcludes(new String[] {// 只要设置这个数组，指定过滤哪些字段。 "ctuAcademicStaffCcs", "ctuProjects"}); System.out.println(JSONSerializer.toJSON(list, config).toString());JsonConfig config = new JsonConfig();config.setIgnoreDefaultExcludes(false);config.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);config.registerJsonValueProcessor(Date.class, new DateJsonValueProcessor("yyyy-MM-dd")); // date processor// registerString tempStr = "{"TotalRecords":" + total.toString() + ","Datas":" + JSONSerializer.toJSON(list, config).toString() + "}";out.print(tempStr);package com.common;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;import net.sf.json.JsonConfig;import net.sf.json.processors.JsonValueProcessor;public class DateJsonValueProcessor implements JsonValueProcessor {public static final String Default_DATE_PATTERN = "yyyy-MM-dd";private DateFormat dateFormat;public DateJsonValueProcessor(String datePattern) {try {dateFormat = new SimpleDateFormat(datePattern);} catch (Exception e) {dateFormat = new SimpleDateFormat(Default_DATE_PATTERN);}}public Object processArrayValue(Object value, JsonConfig jsonConfig) {return process(value);}public Object processObjectValue(String key, Object value,JsonConfig jsonConfig) {return process(value);}private Object process(Object value) {return dateFormat.format((Date) value);}}package com.common;import net.sf.json.JSONObject;import net.sf.json.JsonConfig;import net.sf.json.processors.*;public class HibernateJsonBeanProcessor implements JsonBeanProcessor {public JSONObject processBean(Object obj, JsonConfig jsonConfig) {return new JSONObject();}}package com.common;import net.sf.json.processors.*; import java.util.Set; import org.apache.log4j.Logger; public class HibernateJsonBeanProcessorMatcher extends JsonBeanProcessorMatcher { private static Logger log = Logger .getLogger(HibernateJsonBeanProcessorMatcher.class); @Overridepublic Object getMatch(Class target, Set set) {System.out.println("@target.getName()="+target.getName());if (target.getName().contains("$$EnhancerByCGLIB$$")) {log.warn("Found Lazy-References in Hibernate object " + target.getName());return org.hibernate.proxy.HibernateProxy.class;}return DEFAULT.getMatch(target, set);} }