Fastjson使用例子.doc

fastjson使用整理1. fastjson序列化序列化是指从java对象转换到json字符串格式过程，fastjson序列化支持序列化成可阅读性强的prettyjson格式json。序列化使用代码为：/ FjsonDemo.java文件为：public class FjsonDemo public static void main(String args) toJSONString(); public static void toJSONString() UserInfo user = new UserInfo(); user.setMessageCount(1); Session session = new Session(); session.setFlag(1); List mobileList = new ArrayList(); mobileList.add; mobileList.add; session.setMobileList(mobileList); session.setSessionKey(07dKmRTD6FqXsz0r); session.setUserId(10501L); session.setVip(false); user.setSession(session); user.setUserName(helloworld); user.setImage(cukOgXPuaqypOUBLG89vobY_E-Q.jpg);/ toJSONString方法为fastjson提供的序列化方法/ toJSONString设定true代表生成prettyJson风格字符串 String json = JSON.toJSONString(user); String prettyJson = JSON.toJSONString(user, true); System.out.println(json); System.out.println(prettyJson); / UserInfo.javapublic class UserInfo private String userName; private int messageCount; private String image; private Session session;/ session数据 / getter/setter方法省略/ Session.java文件为：public class Session private String sessionKey; private long userId; private boolean isVip;/ 生成的key名称为vip，干掉了is private int flag; private List mobileList; / getter/setter方法省略2. fastjson反序列化反序列化只指从json字符串转换到java对象，处理代码为：/ FjsonDemo.java文件为：public class FjsonDemo public static void main(String args) String json = toJSONString(); UserInfo user = parseJSONString(json); System.out.println(userName= + user.getUserName(); System.out.println(userId= + user.getSession().getUserId(); / 序列化方法 public static String toJSONString() UserInfo user = new UserInfo(); user.setMessageCount(1); Session session = new Session(); session.setFlag(1); List mobileList = new ArrayList(); mobileList.add; mobileList.add; session.setMobileList(mobileList); session.setSessionKey(07dKmRTD6FqXsz0r); session.setUserId(10501L); session.setVip(false); user.setSession(session); user.setUserName(helloworld); user.setImage(cukOgXPuaqypOUBLG89vobY_E-Q.jpg); String json = JSON.toJSONString(user); String prettyJson = JSON.toJSONString(user, true); System.out.println(json); System.out.println(prettyJson); return json; / 反序列化方法/ 调用fastjson提供的parseObject方法，传入UserInfo.class参数 public static UserInfo parseJSONString(String json) UserInfo user = (UserInfo) JSON.parseObject(json, UserInfo.class); return user;输出结果为：image:cukOgXPuaqypOUBLG89vobY_E-Q.jpg,messageCount:1,session:flag:1,mobileList13438364231,sessionKey:07dKmRTD6FqXsz0r,userId:10501,vip:false,userName:helloworldimage:cukOgXPuaqypOUBLG89vobY_E-Q.jpg,messageCount:1,session:flag:1,mobileList13438364231,sessionKey:07dKmRTD6FqXsz0r,userId:10501,vip:false,userName:helloworlduserName=helloworlduserId=105013. fastjson注解使用3.1. JSONTypeorders属性ignores属性orders属性可以设置序列化顺序，ignores可以将不需要序列化的字段排除掉3.2. JSONFieldname属性，设置别名操作演示代码为：/ UserInfo.java文件为：/ 设置排序规则JSONType(orders = session, image, mCount, ignores = userName)public class UserInfo private String userName; / 设置别名为mCount JSONField(name = mCount) private int messageCount; private String image; private Session session; public String getUserName() return userName; public void setUserName(String userName) this.userName = userName; public int getMessageCount() return messageCount; public void setMessageCount(int messageCount) this.messageCount = messageCount; public String getImage() return image; public void setImage(String image) this.image = image; public Session getSession() return session; public void setSession(Session session) this.session = session; / Session.java文件为：/ 设置排序规则JSONType(orders = sessionKey, userId, vip, mobileList, ignores = flag)public class Session private String sessionKey; private long userId; / 设置别名为vip JSONField(name = vip) private boolean isVip; private int flag; private List mobileList; public String getSessionKey() return sessionKey; public void setSessionKey(String sessionKey) this.sessionKey = sessionKey; public long getUserId() return userId; public void setUserId(long userId) this.userId = userId; public boolean isVip() return isVip; public void setVip(boolean isVip) this.isVip = isVip; public int getFlag() return flag; public void setFlag(int flag) this.flag = flag; public List getMobileList() return mobileList; public void setMobileList(List mobileList) this.mobileList = mobile