json和Java互换
2016-05-12 14:58
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jsonLib经典文章:http://json-lib.sourceforge.net/xref-test/net/sf/json/TestJSONObject.html
// 引入相应的包
//json-lib-2.2-jdk15.jar
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
1. //把Java对象列表转换为json对象数组,并转为字符串
JSONArrayarray = JSONArray.fromObject(userlist);
Stringjsonstr = array.toString();
2.//把java对象转换成json对象,并转化为字符串
JSONObject object =JSONObject.fromObject(invite);
Log4jInit.ysulogger.debug(object.toString());
3.//把JSON字符串转换为JAVA对象数组
String personstr =getRequest().getParameter("persons");
JSONArray json =JSONArray.fromObject(personstr);
List<InvoidPerson>persons =(List<InvoidPerson>)JSONArray.toCollection(json,nvoidPerson.class);
4.//把JSON字符串转换为JAVA对象
str ="{\"lendperson\":\"李四\",\"lendcompany\":\"有限公司\",\"checkperson\":\"李四\",
\"lenddate\":\"2010-07-19T00:00:00\",\"lendcounts\":4,\"
passports\":[{\"passportid\":\"d\",\"name\":\"李豫川\",\"passporttype\":\"K\"},
{\"passportid\":\"K9051\",\"name\":\"李平\",\"passporttype\":\"K\"},
{\"passportid\":\"K90517\",\"name\":\"袁寒梅\",\"passporttype\":\"K\"},
{\"passportid\":\"K905199\",\"name\":\"贺明\",\"passporttype\":\"K\"}]}";
JSONObjectjsonobject = JSONObject.fromObject(str);
PassportLendsEntitypassportlends = null;
try {
//获取一个json数组
JSONArrayarray = jsonobject.getJSONArray("passports");
//将json数组 转换成List<PassPortForLendsEntity>泛型
List<PassPortForLendsEntity>list = newArrayList<PassPortForLendsEntity>();
for (int i =0; i < array.size(); i++){
JSONObject object =(JSONObject)array.get(i);
PassPortForLendsEntity passport =(PassPortForLendsEntity)JSONObject.toBean(object,
PassPortForLendsEntity.class);
if(passport != null){
list.add(passport);
}
}
//转换PassportLendsEntity实体类
passportlends= (PassportLendsEntity)JSONObject.toBean(jsonobject,PassportLendsEntity.class);
// 引入相应的包
//json-lib-2.2-jdk15.jar
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
1. //把Java对象列表转换为json对象数组,并转为字符串
JSONArrayarray = JSONArray.fromObject(userlist);
Stringjsonstr = array.toString();
2.//把java对象转换成json对象,并转化为字符串
JSONObject object =JSONObject.fromObject(invite);
Log4jInit.ysulogger.debug(object.toString());
3.//把JSON字符串转换为JAVA对象数组
String personstr =getRequest().getParameter("persons");
JSONArray json =JSONArray.fromObject(personstr);
List<InvoidPerson>persons =(List<InvoidPerson>)JSONArray.toCollection(json,nvoidPerson.class);
4.//把JSON字符串转换为JAVA对象
str ="{\"lendperson\":\"李四\",\"lendcompany\":\"有限公司\",\"checkperson\":\"李四\",
\"lenddate\":\"2010-07-19T00:00:00\",\"lendcounts\":4,\"
passports\":[{\"passportid\":\"d\",\"name\":\"李豫川\",\"passporttype\":\"K\"},
{\"passportid\":\"K9051\",\"name\":\"李平\",\"passporttype\":\"K\"},
{\"passportid\":\"K90517\",\"name\":\"袁寒梅\",\"passporttype\":\"K\"},
{\"passportid\":\"K905199\",\"name\":\"贺明\",\"passporttype\":\"K\"}]}";
JSONObjectjsonobject = JSONObject.fromObject(str);
PassportLendsEntitypassportlends = null;
try {
//获取一个json数组
JSONArrayarray = jsonobject.getJSONArray("passports");
//将json数组 转换成List<PassPortForLendsEntity>泛型
List<PassPortForLendsEntity>list = newArrayList<PassPortForLendsEntity>();
for (int i =0; i < array.size(); i++){
JSONObject object =(JSONObject)array.get(i);
PassPortForLendsEntity passport =(PassPortForLendsEntity)JSONObject.toBean(object,
PassPortForLendsEntity.class);
if(passport != null){
list.add(passport);
}
}
//转换PassportLendsEntity实体类
passportlends= (PassportLendsEntity)JSONObject.toBean(jsonobject,PassportLendsEntity.class);
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