android 字符串 转json,android 字符串转json

import java.lang.reflect.Field;

import java.util.List;

/**

* List 转换成'',格式的字符串输出

* @author Administrator

*

*/

public class ToStringUtils {

/**

* Object To json String

*

* @param obj

*

* @return json String

*/

public static String objToJsonString(Object obj) {

// 初始化返回值

String json = "str_empty";

if (obj == null) {

return json;

}

StringBuilder buff = new StringBuilder();

Field[] fields = obj.getClass().getFields();

try {

buff.append("[");

buff.append("{");

int i = 0;

for (Field field : fields) {

if (i != 0) {

buff.append(",");

}

buff.append(field.getName());

buff.append(":");

buff.append("\"");

buff.append(field.get(obj) == null ? "" : field.get(obj));

buff.append("\"");

i++;

}

buff.append("}");

buff.append("]");

json = buff.toString();

} catch (Exception e) {

throw new RuntimeException("cause:" + e.toString());

}

return json;

}

public static String listToString(List ss) {

StringBuffer s = new StringBuffer("");

if (null != ss) {

String[] str = new String[ss.size()];

for (int i=0; i

str[i] = ss.get(i).toString();

}

arrayToString(str);

s.append(arrayToString(str));

}

return s.toString();

}

/**

* 把数组转换成'',格式的字符串输出

* @param ss

* @return

*/

public static String arrayToString(String[] ss){

StringBuffer s = new StringBuffer("");

if(null != ss){

for(int i=0;i

s.append("'")

.append(ss[i])

.append("'")

.append(",");

}

if(ss.length>0){

s.append("'").append(ss[ss.length-1]).append("'");

}

}

return s.toString();

}

/**

* Convert an array of strings to one string.

* Put the 'separator' string between each element.

* @param a

* @param separator

* @return

*/

public static String arrayToString(String[] a, String separator) {

StringBuffer result = new StringBuffer();

if(a==null){

return "";

}

if (a.length > 0) {

result.append(a[0]);

for (int i=1; i

result.append(separator);

result.append(a[i]);

}

}

return result.toString();

}

}