字符串拆分

String str = "1:2-2:3-3:2-4:5-5:6-1:3-2:4-3:3-";
问题:1:2-是一对,2:3-,3:2-,....
如何把1:2和1:3的中的2和3值相加
最后的效果如下:
String str ="1:5-2:7-3:5-4:5-5:6";
请问怎么使用java实现?

demojava 给力 2012年11月8日 22:58:42 帮忙写代码;
[code="java"]
public static void main(String[] args) {
String str = "1:2-2:3-3:2-4:5-5:6-1:3-2:4-3:3-";
Map map=new HashMap();
String [] array1=str.split("-");
String [] array2=null;
for (int i = 0; i < array1.length; i++) {
Integer val1=Integer.valueOf(array1[i].split(":")[0]);
Integer val2=Integer.valueOf(array1[i].split(":")[1]);
Integer temp=0;
if(map.containsKey(val1))
{
temp=map.get(val1);
temp=temp+val2;
map.put(val1, temp);
}else
{
map.put(val1, val2);
}
}
Integer [] array3=new Integer [map.size()];
int i=0;
for (Map.Entrymap1:map.entrySet()) {
array3[i]=map1.getKey();
i++;
}
Arrays.sort(array3);
String temp1="";
for (int j = 0; j < array3.length; j++) {
if(j==array3.length-1)
{
temp1+=array3[j]+":"+map.get(array3[j]);
}else
{
temp1+=array3[j]+":"+map.get(array3[j])+"-";
}
}
System.err.println(temp1);

}
[/code]
测试结果:
1:5-2:7-3:5-4:5-5:6

import java.util.regex.*;

public class Example{

public static void main(String[] vs){

    String str = "1:2-2:3-3:2-4:5-5:6-1:3-2:4-3:3-"; 
    System.out.println(split(str));


}

public static String split(String data){
    StringBuffer rst = new StringBuffer();
    for(int i=0;i<10;i++){
        int sum = sum(data,String.valueOf(i));
        if(sum == 0){
            continue;
        }
        rst.append(i).append(":").append(sum).append("-");
    }
    if(rst.length() > 1){
        rst.deleteCharAt(rst.length()- 1);
    }
    return rst.toString();
}

public static int sum(String data,String key){
    int rst = 0;
    Pattern p = Pattern.compile(key + "\\s*:\\s*(\\d+)");
    Matcher m = p.matcher(data);
    while(m.find()){
        rst += Integer.valueOf(m.group(1));
    }
    return rst;
}

}[code="java"][/code]