java json格式化工具类
import java.beans.IntrospectionException;import java.beans.Introspector;import java.beans.PropertyDescriptor;import java.util.List;/** * * @author kingschan * @version 1.0 * Json 字符串生成工具类 * <P> * 传入数扰载体，生成json格式字符串 * </p> */public class JsonUtil {/** * @param object * 任意对象 * @return java.lang.String */public static String objectToJson(Object object) {StringBuilder json = new StringBuilder();if (object == null) {json.append("""");} else if (object instanceof String || object instanceof Integer) {json.append(""").append((String) object).append(""");} else {json.append(beanToJson(object));}return json.toString();}/** * 功能描述:传入任意一个 javabean 对象生成一个指定规格的字符串 * * @param bean * bean对象 * @return String */public static String beanToJson(Object bean) {StringBuilder json = new StringBuilder();json.append("{");PropertyDescriptor[] props = null;try {props = Introspector.getBeanInfo(bean.getClass(), Object.class).getPropertyDescriptors();} catch (IntrospectionException e) {}if (props != null) {for (int i = 0; i < props.length; i++) {try {String name = objectToJson(props[i].getName());String value = objectToJson(props[i].getReadMethod().invoke(bean));json.append(name);json.append(":");json.append(value);json.append(",");} catch (Exception e) {}}json.setCharAt(json.length() - 1, '}');} else {json.append("}");}return json.toString();}/** * 功能描述:通过传入一个列表对象,调用指定方法将列表中的数据生成一个JSON规格指定字符串 * * @param list * 列表对象 * @return java.lang.String */public static String listToJson(List<?> list) {StringBuilder json = new StringBuilder();json.append("[");if (list != null && list.size() > 0) {for (Object obj : list) {json.append(objectToJson(obj));json.append(",");}json.setCharAt(json.length() - 1, ']');} else {json.append("]");}return json.toString();}}