com.lq.comment.util.JsonOperate Maven / Gradle / Ivy

Go to download
package com.lq.comment.util;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class JsonOperate {

    private static final String
            stringType = "java.lang.String",
            charType = "char",
            listType = "java.util.List",
            packArr = "[L",
            packStringArr = "[Ljava.lang.String;";

    private static final List normalArr = Arrays.asList("[I", "[F", "[Z", "[D", "[C");

    private static final String packageName = "com.lq.doc.entity";

    public static String objectToJson(Object o) throws Exception {
        Class aClass = o.getClass();
        StringBuilder jsonSb = new StringBuilder();
        objectToJson(o, aClass, jsonSb);
        jsonSb.delete(jsonSb.length() - 1, jsonSb.length());
        return jsonSb.toString();
    }

    private static void objectToJson(Object o, Class aClass, StringBuilder jsonSb) throws Exception {
        jsonSb.append("{");
        List declaredFieldList = new ArrayList<>();
        ClassUtil.getDeclaredFields(aClass,declaredFieldList);
        for (Field field : declaredFieldList) {
            field.setAccessible(true);
            String type = field.getType().getName();
            String name = field.getName();
            Object val = field.get(o);
            jsonSb.append("\"").append(name).append("\":");
            if (type.equals(stringType) || type.equals(charType)) {
                jsonSb.append("\"").append(val).append("\",");
            } else if (type.equals(listType)) {
                String typeName = field.getGenericType().getTypeName();
                if (typeName.contains(stringType) || typeName.contains(charType)) {
                    List vals = (List) val;
                    if (vals != null && vals.size() > 0) {
                        jsonSb.append("[");
                        for (Object o1 : vals) {
                            jsonSb.append("\"").append(o1).append("\",");
                        }
                        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                    } else {
                        jsonSb.append("[],");
                    }
                } else if (typeName.contains(packageName)) {
                    List vals = (List) val;
                    if (vals != null && vals.size() > 0) {
                        jsonSb.append("[");
                        for (Object o1 : vals) {
                            objectToJson(o1, o1.getClass(), jsonSb);
                        }
                        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                    } else {
                        jsonSb.append("[],");
                    }
                } else {
                    jsonSb.append(val);
                }
            } else if (val != null && val.getClass().isEnum()) {
                jsonSb.append("\"").append(val).append("\",");
            } else if (val != null && type.contains(packageName)) {
                objectToJson(val, val.getClass(), jsonSb);
            } else if (type.startsWith(packArr)) {
                Object[] objArr = (Object[]) val;
                if (objArr != null && objArr.length > 0) {
                    jsonSb.append("[");
                    if (type.equals(packStringArr)) {
                        for (Object v : objArr) {
                            jsonSb.append("\"").append(v).append("\",");
                        }
                    } else {
                        for (Object v : objArr) {
                            jsonSb.append(v).append(",");
                        }
                    }
                    jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                } else {
                    jsonSb.append("[],");
                }
            } else if (normalArr.contains(type)) {
                if (type.equals(normalArr.get(0))) {
                    int[] intVal = (int[]) val;
                    if (intVal != null && intVal.length > 0) {
                        jsonSb.append("[");
                        for (int v : intVal) {
                            jsonSb.append(v).append(",");
                        }
                        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                    } else {
                        jsonSb.append("[],");
                    }
                } else if (type.equals(normalArr.get(1))) {
                    float[] intVal = (float[]) val;
                    if (intVal != null && intVal.length > 0) {
                        jsonSb.append("[");
                        for (float v : intVal) {
                            jsonSb.append(v).append(",");
                        }
                        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                    } else {
                        jsonSb.append("[],");
                    }
                } else if (type.equals(normalArr.get(2))) {
                    boolean[] intVal = (boolean[]) val;
                    if (intVal != null && intVal.length > 0) {
                        jsonSb.append("[");
                        for (boolean v : intVal) {
                            jsonSb.append(v).append(",");
                        }
                        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                    } else {
                        jsonSb.append("[],");
                    }
                } else if (type.equals(normalArr.get(3))) {
                    double[] intVal = (double[]) val;
                    if (intVal != null && intVal.length > 0) {
                        jsonSb.append("[");
                        for (double v : intVal) {
                            jsonSb.append(v).append(",");
                        }
                        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("],");
                    } else {
                        jsonSb.append("[],");
                    }
                } else {
                    jsonSb.append("[],");
                }
            } else {
                jsonSb.append(val).append(",");
            }
        }
        jsonSb.delete(jsonSb.length() - 1, jsonSb.length()).append("},");
    }

}