例如: Map m = new HashMap();
m.put("流水号", "1");
m.put("交易号", "2");
m.put("名字", "3");
m.put("金额", "4");
m.put("地址", "5");
m.put("流水号1", "A");
m.put("交易号1", "B");
m.put("名字1", "C");
m.put("金额1", "D");
m.put("地址1", "E");如何转换成 : answer[0][0] = "流水号";
answer[0][1] = "交易号";
answer[0][2] = "名字";
answer[0][3] = "金额";
answer[0][4] = "地址"; answer[1][0] = "1";
answer[1][1] = "2";
answer[1][2] = "3";
answer[1][3] = "4";
answer[1][4] = "5"; answer[2][0] = "A";
answer[2][1] = "B";
answer[2][2] = "C";
answer[2][3] = "D";
answer[2][4] = "E";
m.put("流水号", "1");
m.put("交易号", "2");
m.put("名字", "3");
m.put("金额", "4");
m.put("地址", "5");
m.put("流水号1", "A");
m.put("交易号1", "B");
m.put("名字1", "C");
m.put("金额1", "D");
m.put("地址1", "E");如何转换成 : answer[0][0] = "流水号";
answer[0][1] = "交易号";
answer[0][2] = "名字";
answer[0][3] = "金额";
answer[0][4] = "地址"; answer[1][0] = "1";
answer[1][1] = "2";
answer[1][2] = "3";
answer[1][3] = "4";
answer[1][4] = "5"; answer[2][0] = "A";
answer[2][1] = "B";
answer[2][2] = "C";
answer[2][3] = "D";
answer[2][4] = "E";
解决方案 »
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public static void main(String[] args) {
Map<String,String> m = new HashMap<String,String>(); m.put("流水号", "1");
m.put("交易号", "2");
m.put("名字", "3");
m.put("金额", "4");
m.put("地址", "5"); m.put("流水号1", "A");
m.put("交易号1", "B");
m.put("名字1", "C");
m.put("金额1", "D");
m.put("地址1", "E");
String[][] arr = converMapToArray(m);
for(int i = 0 ; i < arr.length ; i++){
for(int j = 0; j < arr[i].length;j++){
System.out.print(arr[i][j] + " \t");
}
System.out.println();
} }
public static String[][] converMapToArray(Map<String,String> map){
Set<String> keySet = map.keySet();
String[][] arr = new String[(int) Math.ceil(keySet.size()/5)+1][5];
arr[0][0] = "流水号";
arr[0][1] = "交易号";
arr[0][2] = "名字";
arr[0][3] = "金额";
arr[0][4] = "地址";
for(int i =0 ; i < Math.ceil(keySet.size()/5) ;i ++){
//后缀
String endStr = i==0 ? "" : String.valueOf(i);
for(int j=0 ; j<arr[0].length; j++){
String key = arr[0][j]+ endStr;
System.out.println(key);
arr[i+1][j] = map.get(key);
}
}
return arr;
}试一下吧.