Java中把一个对象转换成JsonString

**

* Object To json String

*

* @param obj

*

* @return json String

*/

public static String objToJsonString(Object obj) {

// 初始化返回值

String json = "str_empty";

if (obj == null) {

return json;

}

StringBuilder buff = new StringBuilder();

Field fields[] = obj.getClass().getFields();

try {

buff.append("[");

buff.append("{");

int i = 0;

for (Field field : fields) {

if (i != 0) {

buff.append(",");

}

buff.append(field.getName());

buff.append(":");

buff.append("\"");

buff.append(field.get(obj) == null ? "" : field.get(obj));

buff.append("\"");

i++;

}

buff.append("}");

buff.append("]");

json = buff.toString();

} catch (Exception e) {

throw new RuntimeException("cause:" + e.toString());

}

return json;

}