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json工具类:object与json的相互转换, listjson的相互转换
t添加pom.xml的依赖
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.5</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
MyJsonUtil.java
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
import com.atguigu.bean.T_MALL_SHOPPINGCAR;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import net.sf.json.JSONArray;
public class MyJsonUtil {
public static <T> String object_to_json(T t) {
Gson gson = new Gson();
String json = gson.toJson(t);
try {
json = URLEncoder.encode(json, "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return json;
}
public static <T> T json_to_object(String json, Class<T> t) {
try {
json = URLDecoder.decode(json, "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Gson gson = new Gson();
T fromJson = gson.fromJson(json, t);
return fromJson;
}
public static <T> List<T> json_to_list(String json, Class<T> t) {
String decode = "";
if (StringUtils.isBlank(json)) {
return null;
} else {
try {
decode = URLDecoder.decode(json, "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JSONArray fromObject2 = JSONArray.fromObject(decode);
List<T> list_array = (List<T>) JSONArray.toCollection(fromObject2, t);
return list_array;
}
}
public static <T> String list_to_json(List<T> list) {
Gson gson = new Gson();
String json = gson.toJson(list);
try {
json = URLEncoder.encode(json, "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return json;
}
}