JSONArrayBuilder:用于生成格式简单的json array字符串

JSONArrayBuilder

import java.util.Iterator;import java.util.LinkedHashMap;import java.util.LinkedList;import java.util.List;import java.util.Map;/** * 用于生成json数组 * @author shanl * */public class JSONArrayBuilder {List<Map<String,String>> ls = new LinkedList<Map<String,String>>();Map<String,String> object = null;public void newObject(){object = new LinkedHashMap<String,String>();}public void endObject(){if(null==object){throw new RuntimeException("请先调用newObject()");}ls.add(object);}public void put(String key, String value){if(null==object){throw new RuntimeException("请先调用newObject()");}this.object.put(replaceJsonChar(key), replaceJsonChar(value));}//public void add(Map<String,String> item){//ls.add(item);//}public void add(JSONArrayBuilder ja){add(ja.getJsonArray());}public void add(List<Map<String,String>> ls){this.ls.addAll(ls);}public List<Map<String,String>> getJsonArray(){return ls;}/** * 将数据转换成json格式字符�? * @return */public String toJsonString(){String sb = "";String key = null;String value = null;Iterator<String> keys = null;sb  = "[";for(Map<String,String> item: ls){keys = item.keySet().iterator();sb += "{";while(keys.hasNext()){key = keys.next();value = item.get(key);sb += "\""+ key +"\":";sb += "\""+ value +"\",";}if(sb.endsWith(",")){sb = sb.substring(0, sb.length()-1);}sb += "},";}if(sb.endsWith(",") ){sb = sb.substring(0, sb.length()-1);}sb += "]";sb = sb.replaceAll("\\{\\},", "");sb = sb.replaceAll("\\{\\}", "");return sb;}public String toString(){return toJsonString();}private String replaceJsonChar(String str){StringBuilder sb = new StringBuilder();char[] chs = str.toCharArray();for(char c: chs){switch (c) {         case '\"':             sb.append("\\\"");             break;         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;         default:             sb.append(c);         } }return sb.toString();}}

JSONArrayBuilder 的测试类

public class Test4 {public static void main(String[] args){t2();//t1();}static void t2(){JSONArrayBuilder jsonArrayBuilder = new JSONArrayBuilder();jsonArrayBuilder.newObject();//for(int i=0; i<2; i++){//jsonArrayBuilder.put("msg", "测试消息"+i);//jsonArrayBuilder.put("result", "true");//}jsonArrayBuilder.endObject();jsonArrayBuilder.newObject();for(int i=0; i<5; i++){jsonArrayBuilder.put("msg"+i, "测试消息"+i);jsonArrayBuilder.put("result", "true");}jsonArrayBuilder.endObject();String ja = jsonArrayBuilder.toJsonString();System.out.println(ja);}static void t1(){JSONArrayBuilder jsonArrayBuilder = new JSONArrayBuilder();for(int i=0; i<2; i++){jsonArrayBuilder.newObject();jsonArrayBuilder.put("msg", "测试消息"+i);jsonArrayBuilder.put("result", "true");jsonArrayBuilder.endObject();}JSONArrayBuilder jsonArrayBuilder0 = new JSONArrayBuilder();for(int i=0; i<2; i++){jsonArrayBuilder0.newObject();jsonArrayBuilder0.put("msg", "测试消息"+i);jsonArrayBuilder0.put("result", "true");jsonArrayBuilder0.endObject();}jsonArrayBuilder.add(jsonArrayBuilder0);String ja = jsonArrayBuilder.toJsonString();System.out.println(ja);}}