最近面试的时候有一些心得总结是关于String转换list的
代码如下：
String sL = "["
+ "{\"id\":\"1\",\"name\":\"张三\"},"
+ "{\"id\":\"2\",\"name\":\"李四\"},"
+ "{\"id\":\"3\",\"name\":\"王五\"},"
+ "{\"id\":\"4\",\"name\":\"李雷\"}"
+ "]";
String sS = "[{\"stuId\":\"1\", \"subjectId\":\"1\", \"subjectName\":\"英语\", \"score\":\"90\"},"
+ "{\"stuId\":\"1\", \"subjectId\":\"2\", \"subjectName\":\"数学\", \"score\":\"80\"},"
+ "{\"stuId\":\"1\", \"subjectId\":\"3\", \"subjectName\":\"语文\", \"score\":\"70\"},"
+ "{\"stuId\":\"2\", \"subjectId\":\"1\", \"subjectName\":\"英语\", \"score\":\"85\"},"
+ "{\"stuId\":\"2\", \"subjectId\":\"2\", \"subjectName\":\"数学\", \"score\":\"75\"},"
+ "{\"stuId\":\"2\", \"subjectId\":\"3\", \"subjectName\":\"语文\", \"score\":\"90\"},{\"stuId\":\"3\", \"subjectId\":\"3\", \"subjectName\":\"语文\", \"score\":\"60\"}]";
List<Map<String,Object>>list = new ArrayList<Map<String,Object>>();
List<Map<String,Object>>list1 = new ArrayList<Map<String,Object>>();
sL = sL.replaceAll("[\\[\\]]", "");//去除方括号
String[] splitArray = sL.split("},");//去除大括号
sS = sS.replaceAll("[\\[\\]]", "");//去除方括号
String[] splitArray1 = sS.split("},");//去除大括号
for(int i=0; i<splitArray.length;i++) {
if(i==splitArray.length-1) {
splitArray[i] = splitArray[i].substring(1, splitArray[i].length()-1);
}else {
splitArray[i]=splitArray[i].substring(1, splitArray[i].length());
}
Map<String,Object> map = new HashMap<String,Object>();
String[] mapArray = splitArray[i].split(",");
for(int j=0 ;j<mapArray.length ;j++) {
String str = mapArray[j].replaceAll("\"", "");
String[] keyValue = str.split(": ");
//防止value为空
if(keyValue.length==2)
map.put(keyValue[0], keyValue[1]);
else
map.put(keyValue[0], "");
}
list.add(map);
}
for(int i=0; i<splitArray1.length;i++) {
if(i==splitArray1.length-1) {
splitArray1[i] = splitArray1[i].substring(1, splitArray1[i].length()-1);
}else {
splitArray1[i]=splitArray1[i].substring(1, splitArray1[i].length());
}
Map<String,Object> map1 = new HashMap<String,Object>();
String[] mapArray1 = splitArray1[i].split(",");
for(int j=0 ;j<mapArray1.length ;j++) {
String str = mapArray1[j].replaceAll("\"", "");
String[] keyValue = str.split(":");
if(keyValue.length==2)
map1.put(keyValue[0], keyValue[1]);
else
map1.put(keyValue[0], "");
}
list1.add(map1);
}
这是两个string的转换list但是没有把两个list合并键和值的理解自己看一看
string先转换成map再转换成list
这个是大厂的邮箱面试题，大家可以做个参考学习
