json字符串解析

浅浅的花香味﹌ 2022-08-02 06:04 205阅读 0赞

<span style="font-size:14px;">package com.gamesvr.framework.util;
    
    
    
    import java.beans.IntrospectionException;
    import java.beans.Introspector;
    import java.beans.PropertyDescriptor;
    import java.math.BigDecimal;
    import java.math.BigInteger;
    import java.util.*;
    import java.text.SimpleDateFormat;
    
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    import net.sf.json.JsonConfig;
    import net.sf.json.processors.JsonValueProcessor;
    import net.sf.json.xml.XMLSerializer;
    
    /**
     * @ClassName：JSONUtil
     * @ClassRemark：
     * @Author：txxs
     * @UpdateRemark：
     * @version:
     */
    public class JSONUtil {
    
        /**
         * object2JSONString  Bean List Map等对象转JsonString
         *
         * @param Object obj(JavaBean List Map Array ...)
         * @return JsonString
         */
        public static String object2JSONString(Object obj) {
            StringBuilder json = new StringBuilder();
            if (obj == null) {
                json.append("\"\"");
            } else if (obj instanceof String || obj instanceof Integer || obj instanceof Float || obj instanceof Boolean
                    || obj instanceof Short || obj instanceof Double || obj instanceof Long || obj instanceof BigDecimal
                    || obj instanceof BigInteger || obj instanceof Byte) {
                json.append("\"").append(string2JSONString(obj.toString())).append("\"");
            } else if (obj instanceof Object[]) {
                json.append(array2JSONString((Object[]) obj));
            } else if (obj instanceof List) {
                json.append(list2JSONString((List<?>) obj));
            } else if (obj instanceof Map) {
                json.append(map2JSONString((Map<?, ?>) obj));
            } else if (obj instanceof Set) {
                json.append(set2JSONString((Set<?>) obj));
            } else {
                json.append(bean2JSONString(obj));
            }
            return json.toString();
        }
    
        /**
         * bean2JSONString  Bean转换JsonString
         *
         * @param Object bean
         * @return JsonString
         */
        public static String bean2JSONString(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 = object2JSONString(props[i].getName());
                        String value = object2JSONString(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();
        }
    
        /**
         * list2JSONString List转换JsonString
         *
         * @param List list
         * @return JsonString
         */
        public static String list2JSONString(List<?> list) {
            StringBuilder json = new StringBuilder();
            json.append("[");
            if (list != null && list.size() > 0) {
                for (Object obj : list) {
                    json.append(object2JSONString(obj));
                    json.append(",");
                }
                json.setCharAt(json.length() - 1, ']');
            } else {
                json.append("]");
            }
            return json.toString();
        }
    
        /**
         * array2JSONString    Array转换JsonString
         *
         * @param Object[] array
         * @return JsonString
         */
        public static String array2JSONString(Object[] array) {
            StringBuilder json = new StringBuilder();
            json.append("[");
            if (array != null && array.length > 0) {
                for (Object obj : array) {
                    json.append(object2JSONString(obj));
                    json.append(",");
                }
                json.setCharAt(json.length() - 1, ']');
            } else {
                json.append("]");
            }
            return json.toString();
        }
    
        /**
         * map2JSONString Map转换JsonString
         *
         * @param Map map
         * @return JsonString
         */
        public static String map2JSONString(Map<?, ?> map) {
            StringBuilder json = new StringBuilder();
            json.append("{");
            if (map != null && map.size() > 0) {
                for (Object key : map.keySet()) {
                    json.append(object2JSONString(key));
                    json.append(":");
                    json.append(object2JSONString(map.get(key)));
                    json.append(",");
                }
                json.setCharAt(json.length() - 1, '}');
            } else {
                json.append("}");
            }
            return json.toString();
        }
    
        /**
         * set2JSONString Set转换JsonString
         *
         * @param Set set
         * @return JsonString
         */
        public static String set2JSONString(Set<?> set) {
            StringBuilder json = new StringBuilder();
            json.append("[");
            if (set != null && set.size() > 0) {
                for (Object obj : set) {
                    json.append(object2JSONString(obj));
                    json.append(",");
                }
                json.setCharAt(json.length() - 1, ']');
            } else {
                json.append("]");
            }
            return json.toString();
        }
    
        /**
         * string2JSONString   String转换JsonString
         *
         * @param String s
         * @return JsonString
         * @Exception（异常对象）
         */
        public static String string2JSONString(String s) {
            if (s == null)
                return "";
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.length(); i++) {
                char ch = s.charAt(i);
                switch (ch) {
                    case '"':
                        sb.append("\\\"");
                        break;
                    case '\\':
                        sb.append("\\\\");
                        break;
                    case '\b':
                        sb.append("\\b");
                        break;
                    case '\f':
                        sb.append("\\f");
                        break;
                    case '\n':
                        sb.append("\\n");
                        break;
                    case '\r':
                        sb.append("\\r");
                        break;
                    case '\t':
                        sb.append("\\t");
                        break;
                    case '/':
                        sb.append("\\/");
                        break;
                    default:
                        if (ch >= '\u0000' && ch <= '\u001F') {
                            String ss = Integer.toHexString(ch);
                            sb.append("\\u");
                            for (int k = 0; k < 4 - ss.length(); k++) {
                                sb.append('0');
                            }
                            sb.append(ss.toUpperCase());
                        } else {
                            sb.append(ch);
                        }
                }
            }
            return sb.toString();
        }
    
        /**
         * jsonString2Bean 从json串转换成实体对象
         *
         * @param jsonObjStr e.g. {'name':'get','dateAttr':'2009-11-12'}
         * @param clazz      Person.class
         * @return
         */
        public static Object jsonString2Bean(String jsonStr, Class clazz) {
            return JSONObject.toBean(JSONObject.fromObject(jsonStr), clazz);
        }
    
        /**
         * jsonString2Bean 从json串转换成实体对象，并且实体集合属性存有另外实体Bean
         *
         * @param jsonStr  e.g. {'data':[{'name':'get'},{'name':'set'}]}
         * @param clazz    e.g. MyBean.class
         * @param classMap e.g. classMap.put("data", Person.class)
         * @return Object
         */
        public static Object jsonString2Bean(String jsonStr, Class clazz, Map classMap) {
            return JSONObject.toBean(JSONObject.fromObject(jsonStr), clazz, classMap);
        }
    
        /**
         * jsonString2Array 把一个json数组串转换成普通数组
         *
         * @param jsonArrStr e.g. ['get',1,true,null]
         * @return Object[]
         */
        public static Object[] jsonString2Array(String jsonArrStr) {
            return JSONArray.fromObject(jsonArrStr).toArray();
        }
    
        /**
         * jsonString2List 把一个json数组串转换成实体数组
         *
         * @param jsonArrStr e.g. [{'name':'get'},{'name':'set'}]
         * @param clazz      e.g. Person.class
         * @return Object[]
         */
        public static Object[] jsonString2List(String jsonArrStr, Class clazz) {
            JSONArray jsonArr = JSONArray.fromObject(jsonArrStr);
            Object[] objArr = new Object[jsonArr.size()];
            for (int i = 0; i < jsonArr.size(); i++) {
                objArr[i] = JSONObject.toBean(jsonArr.getJSONObject(i), clazz);
            }
            return objArr;
        }
    
        /**
         * jsonString2List 把一个json数组串转换成实体数组，且数组元素的属性含有另外实例Bean
         *
         * @param jsonArrStr e.g. [{'data':[{'name':'get'}]},{'data':[{'name':'set'}]}]
         * @param clazz      e.g. MyBean.class
         * @param classMap   e.g. classMap.put("data", Person.class)
         * @return Object[]
         */
        public static Object[] jsonString2List(String jsonArrStr, Class clazz, Map classMap) {
            JSONArray array = JSONArray.fromObject(jsonArrStr);
            Object[] obj = new Object[array.size()];
            for (int i = 0; i < array.size(); i++) {
                JSONObject jsonObject = array.getJSONObject(i);
                obj[i] = JSONObject.toBean(jsonObject, clazz, classMap);
            }
            return obj;
        }
    
        /**
         * jsonString2List 把一个json数组串转换成存放普通类型元素的集合
         *
         * @param jsonArrStr e.g. ['get',1,true,null]
         * @return List
         */
        public static List jsonString2List(String jsonArrStr) {
            JSONArray jsonArr = JSONArray.fromObject(jsonArrStr);
            List list = new ArrayList();
            for (int i = 0; i < jsonArr.size(); i++) {
                list.add(jsonArr.get(i));
            }
            return list;
        }
    
        /**
         * jsonString2ListBean 把一个json数组串转换成集合，且集合里存放的为实例Bean
         *
         * @param jsonArrStr e.g. [{'name':'get'},{'name':'set'}]
         * @param clazz
         * @return List
         */
        public static List jsonString2ListBean(String jsonArrStr, Class clazz) {
            JSONArray jsonArr = JSONArray.fromObject(jsonArrStr);
            List list = new ArrayList();
            for (int i = 0; i < jsonArr.size(); i++) {
                list.add(JSONObject.toBean(jsonArr.getJSONObject(i), clazz));
            }
            return list;
        }
    
        /**
         * jsonString2ListBean 把一个json数组串转换成集合，且集合里的对象的属性含有另外实例Bean
         *
         * @param jsonArrStr e.g. [{'data':[{'name':'get'}]},{'data':[{'name':'set'}]}]
         * @param clazz      e.g. MyBean.class
         * @param classMap   e.g. classMap.put("data", Person.class)
         * @return List
         */
        public static List jsonString2ListBean(String jsonArrStr, Class clazz, Map classMap) {
            JSONArray jsonArr = JSONArray.fromObject(jsonArrStr);
            List list = new ArrayList();
            for (int i = 0; i < jsonArr.size(); i++) {
                list.add(JSONObject.toBean(jsonArr.getJSONObject(i), clazz, classMap));
            }
            return list;
        }
    
        /**
         * jsonString2Map 把json对象串转换成map对象
         *
         * @param jsonStr e.g. {'name':'get','int':1,'double',1.1,'null':null}
         * @return Map
         */
        public static Map jsonString2Map(String jsonStr) {
            JSONObject jsonObject = JSONObject.fromObject(jsonStr);
            Map map = new HashMap();
            for (Iterator iter = jsonObject.keys(); iter.hasNext(); ) {
                String key = (String) iter.next();
                map.put(key, jsonObject.get(key));
            }
            return map;
        }
    
        /**
         * jsonString2MapBean 把json对象串转换成map对象，且map对象里存放的为其他实体Bean
         *
         * @param jsonStr e.g. {'data1':{'name':'get'},'data2':{'name':'set'}}
         * @param clazz   e.g. Person.class
         * @return Map
         */
        public static Map jsonString2MapBean(String jsonStr, Class clazz) {
            JSONObject jsonObject = JSONObject.fromObject(jsonStr);
            Map map = new HashMap();
            for (Iterator iter = jsonObject.keys(); iter.hasNext(); ) {
                String key = (String) iter.next();
                map.put(key, JSONObject.toBean(jsonObject.getJSONObject(key), clazz));
            }
            return map;
        }
    
        /**
         * jsonString2MapBean 把json对象串转换成map对象，且map对象里存放的其他实体Bean还含有另外实体Bean
         *
         * @param jsonStr  e.g. {'mybean':{'data':[{'name':'get'}]}}
         * @param clazz    e.g. MyBean.class
         * @param classMap e.g. classMap.put("data", Person.class)
         * @return Map
         */
        public static Map jsonString2MapBean(String jsonStr, Class clazz, Map classMap) {
            JSONObject jsonObject = JSONObject.fromObject(jsonStr);
            Map map = new HashMap();
            for (Iterator iter = jsonObject.keys(); iter.hasNext(); ) {
                String key = (String) iter.next();
                map.put(key, JSONObject.toBean(jsonObject.getJSONObject(key), clazz, classMap));
            }
            return map;
        }
    
        /**
         * object2JsonString 把实体Bean、Map对象、数组、列表集合转换成Json串
         *
         * @param obj
         * @return
         * @throws Exception String
         */
        public static String object2JsonString(Object obj) {
            String jsonStr = null;
            //Json配置
            JsonConfig jsonCfg = new JsonConfig();
            //注册日期处理器
            jsonCfg.registerJsonValueProcessor(java.util.Date.class, new JsonDateValueProcessor("yyyyMMdd_HHmmss"));
            if (obj == null) {
                return "{}";
            }
            if (obj instanceof Collection || obj instanceof Object[]) {
                jsonStr = JSONArray.fromObject(obj, jsonCfg).toString();
            } else {
                jsonStr = JSONObject.fromObject(obj, jsonCfg).toString();
            }
            return jsonStr;
        }
    
        /**
         * object2XML 把json串、数组、集合(collection map)、实体Bean转换成XML
         * XMLSerializer API：
         * http://json-lib.sourceforge.net/apidocs/net/sf/json/xml/XMLSerializer.html
         * 具体实例请参考：
         * http://json-lib.sourceforge.net/xref-test/net/sf/json/xml/TestXMLSerializer_writes.html
         * http://json-lib.sourceforge.net/xref-test/net/sf/json/xml/TestXMLSerializer_writes.html
         *
         * @param obj
         * @return
         * @throws Exception String
         */
        public static String object2XML(Object obj) {
            XMLSerializer xmlSerial = new XMLSerializer();
            //Json配置
            JsonConfig jsonCfg = new JsonConfig();
            //注册日期处理器
            jsonCfg.registerJsonValueProcessor(java.util.Date.class, new JsonDateValueProcessor("yyyyMMdd_HHmmss"));
            if ((String.class.isInstance(obj) && String.valueOf(obj).startsWith("[")) || obj.getClass().isArray()
                    || Collection.class.isInstance(obj)) {
                JSONArray jsonArr = JSONArray.fromObject(obj, jsonCfg);
                return xmlSerial.write(jsonArr);
            } else {
                JSONObject jsonObj = JSONObject.fromObject(obj, jsonCfg);
                return xmlSerial.write(jsonObj);
            }
        }
    
        /**
         * xml2JsonString 从XML转json串
         *
         * @param xml
         * @return String
         */
        public static String xml2JsonString(String xml) {
            XMLSerializer xmlSerial = new XMLSerializer();
            return String.valueOf(xmlSerial.read(xml));
        }
    }
    
    /**
     * @ProjectName：srp
     * @ClassName：JsonDateValueProcessor Json日期处理器
     * @ClassRemark：
     * @Author：T08388
     * @UpdateRemark：
     * @version: 1
     */
    class JsonDateValueProcessor implements JsonValueProcessor {
        private String format = "yyyyMMdd_HHmmss";
    
        public JsonDateValueProcessor() {
        }
    
        public JsonDateValueProcessor(String format) {
            this.format = format;
        }
    
        public Object processArrayValue(Object value, JsonConfig jsonConfig) {
            return process(value, jsonConfig);
        }
    
        public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {
            return process(value, jsonConfig);
        }
    
        private Object process(Object value, JsonConfig jsonConfig) {
            if (value instanceof Date) {
                String str = new SimpleDateFormat(format).format((Date) value);
                return str;
            }
            return value == null ? null : value.toString();
        }
    
        public String getFormat() {
            return format;
        }
    
        public void setFormat(String format) {
            this.format = format;
        }
    }</span>