
com.jfinal.json.JFinalJson Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jfinal-java8 Show documentation
Show all versions of jfinal-java8 Show documentation
JFinal is a simple, light, rapid,independent, extensible Java WEB + ORM framework. The feature of JFinal looks like ruby on rails especially ActiveRecord.
The newest version!
/**
* Copyright (c) 2011-2019, James Zhan 詹波 ([email protected]).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jfinal.json;
import java.lang.reflect.Array;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import com.jfinal.kit.StrKit;
import com.jfinal.plugin.activerecord.Model;
import com.jfinal.plugin.activerecord.Record;
/**
* Json 转换 JFinal 实现.
*
* json 到 java 类型转换规则:
* string java.lang.String
* number java.lang.Number
* true|false java.lang.Boolean
* null null
* array java.util.List
* object java.util.Map
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public class JFinalJson extends Json {
private static int defaultConvertDepth = 15;
protected int convertDepth = defaultConvertDepth;
protected String timestampPattern = "yyyy-MM-dd HH:mm:ss";
// protected String datePattern = "yyyy-MM-dd";
/**
* 设置全局性默认转换深度
*/
public static void setDefaultConvertDepth(int defaultConvertDepth) {
if (defaultConvertDepth < 2) {
throw new IllegalArgumentException("defaultConvertDepth depth can not less than 2.");
}
JFinalJson.defaultConvertDepth = defaultConvertDepth;
}
public JFinalJson setConvertDepth(int convertDepth) {
if (convertDepth < 2) {
throw new IllegalArgumentException("convert depth can not less than 2.");
}
this.convertDepth = convertDepth;
return this;
}
public JFinalJson setTimestampPattern(String timestampPattern) {
if (StrKit.isBlank(timestampPattern)) {
throw new IllegalArgumentException("timestampPattern can not be blank.");
}
this.timestampPattern = timestampPattern;
return this;
}
public Json setDatePattern(String datePattern) {
if (StrKit.isBlank(datePattern)) {
throw new IllegalArgumentException("datePattern can not be blank.");
}
this.datePattern = datePattern;
return this;
}
public static JFinalJson getJson() {
return new JFinalJson();
}
protected String mapToJson(Map map, int depth) {
if(map == null) {
return "null";
}
StringBuilder sb = new StringBuilder();
boolean first = true;
Iterator iter = map.entrySet().iterator();
sb.append('{');
while(iter.hasNext()){
if(first)
first = false;
else
sb.append(',');
Map.Entry entry = (Map.Entry)iter.next();
toKeyValue(String.valueOf(entry.getKey()),entry.getValue(), sb, depth);
}
sb.append('}');
return sb.toString();
}
protected void toKeyValue(String key, Object value, StringBuilder sb, int depth){
sb.append('\"');
if(key == null)
sb.append("null");
else
escape(key, sb);
sb.append('\"').append(':');
sb.append(toJson(value, depth));
}
protected String iteratorToJson(Iterator iter, int depth) {
boolean first = true;
StringBuilder sb = new StringBuilder();
sb.append('[');
while(iter.hasNext()){
if(first)
first = false;
else
sb.append(',');
Object value = iter.next();
if(value == null){
sb.append("null");
continue;
}
sb.append(toJson(value, depth));
}
sb.append(']');
return sb.toString();
}
/**
* Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
*/
protected String escape(String s) {
if(s == null)
return null;
StringBuilder sb = new StringBuilder();
escape(s, sb);
return sb.toString();
}
protected void escape(String s, StringBuilder sb) {
for(int i=0; i= '\u0000' && ch <= '\u001F') || (ch >= '\u007F' && ch <= '\u009F') || (ch >= '\u2000' && ch <= '\u20FF')) {
String str = Integer.toHexString(ch);
sb.append("\\u");
for(int k=0; k<4-str.length(); k++) {
sb.append('0');
}
sb.append(str.toUpperCase());
}
else{
sb.append(ch);
}
}
}
}
public String toJson(Object object) {
return toJson(object, convertDepth);
}
protected String toJson(Object value, int depth) {
if(value == null || (depth--) < 0)
return "null";
if(value instanceof String)
return "\"" + escape((String)value) + "\"";
if(value instanceof Double){
if(((Double)value).isInfinite() || ((Double)value).isNaN())
return "null";
else
return value.toString();
}
if(value instanceof Float){
if(((Float)value).isInfinite() || ((Float)value).isNaN())
return "null";
else
return value.toString();
}
if(value instanceof Number)
return value.toString();
if(value instanceof Boolean)
return value.toString();
if (value instanceof java.util.Date) {
if (value instanceof java.sql.Timestamp) {
return "\"" + new SimpleDateFormat(timestampPattern).format(value) + "\"";
}
if (value instanceof java.sql.Time) {
return "\"" + value.toString() + "\"";
}
// 优先使用对象级的属性 datePattern, 然后才是全局性的 defaultDatePattern
String dp = datePattern != null ? datePattern : getDefaultDatePattern();
if (dp != null) {
return "\"" + new SimpleDateFormat(dp).format(value) + "\"";
} else {
return "" + ((java.util.Date)value).getTime();
}
}
if(value instanceof Collection) {
return iteratorToJson(((Collection)value).iterator(), depth);
}
if(value instanceof Map) {
return mapToJson((Map)value, depth);
}
String result = otherToJson(value, depth);
if (result != null)
return result;
// 类型无法处理时当作字符串处理,否则ajax调用返回时js无法解析
// return value.toString();
return "\"" + escape(value.toString()) + "\"";
}
protected String otherToJson(Object value, int depth) {
if (value instanceof Character) {
return "\"" + escape(value.toString()) + "\"";
}
if (value instanceof Model) {
Map map = com.jfinal.plugin.activerecord.CPI.getAttrs((Model)value);
return mapToJson(map, depth);
}
if (value instanceof Record) {
Map map = ((Record)value).getColumns();
return mapToJson(map, depth);
}
if (value.getClass().isArray()) {
int len = Array.getLength(value);
List
© 2015 - 2025 Weber Informatics LLC | Privacy Policy