格式化--json字符串 java源代码

public static String formatJson(String json) {
StringBuffer result = new StringBuffer();
int length=json.length();
int number=0;
char key=0;
//遍历输入字符串
for(int i=0;i<length;i++) {
//获取当前字符
key=json.charAt(i);
//如果当前字符是前方括号、前花括号做如下处理
if((key=='[')||(key=='{')) {
if((i-1>0)&&(json.charAt(i-1)==':')) {
result.append(' ');
result.append(indent(number));
}
//打印当前的字符
result.append(key);
result.append(' ');
number++;
result.append(indent(number));
continue;
}
if((key==']'||(key=='}'))) {
result.append(' ');
number--;
result.append(indent(number));
result.append(key);
if(((i+1)<length)&&(json.charAt(i+1)!=',')) {
result.append(' ');
}
continue;
}
if((key==',')) {
result.append(key);
result.append(' ');
result.append(indent(number));
continue;
}
result.append(key);
}
return result.toString();
}

private static String SPACE=" ";
private static String indent(int number) {
StringBuffer result=new StringBuffer();
for(int i=0;i<number;i++) {
result.append(SPACE);
}
return result.toString();
}