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我试图检索雇员和部门表使用keyset.I有jsonObject的hashmap.How我可以迭代Employee.employeeId使用for循环任何人都可以请帮我...如何通过循环使用键集迭代散列表
我simple.json:
{
"routings": {
"routing1": {
"targetCollection-name": "EmployeeData",
"sourcetables-data": {
"Employee": [{
"name": "employeeId",
"sourceDataType": "number",
"targetField": "employeeId",
"targetDataType": "double"
}, {
"name": "firstName",
"sourceDataType": "varchar2",
"targetField": "firstName",
"targetDataType": "string"
}, {
"name": "lastName",
" sourceDataType": "varchar2",
"targetField": "lastName",
"targetDataType": "string"
}, {
"name": "contactNumber1",
"sourceDataType": "number",
"targetField": "contactNumbers",
"targetDataType": "array"
}],
"department": [{
"name": "departmentNumber",
"sourceDataType": "number",
"targetField": "departmentNumber",
"targetDataType": "double"
}, {
"name": "departmentType",
"sourceDataType": "number",
"targetField": "departmentType",
"targetDataType": "double"
}, {
"name": "startDate",
"sourceDataType": "timestamp",
"targetField": "startDate",
"targetDataType": "date"
}],
"foriegnkey": [{
"parentTable": "Employee",
"parentkey": "employeeId",
"childTable": "department",
"childKey": "empId"
}]
}
}
}
}
我的代码:
public class DataParse {
public static void main(String a[]){
String FILEPATH = "C:\\Users\\BNSK\\Downloads\\simple.json";
Map<String,Object> resultMap = new HashMap<String,Object>();
ObjectMapper mapperObj = new ObjectMapper();
System.out.println("Input Json: "+FILEPATH);
try {
resultMap = mapperObj.readValue(new File(FILEPATH),
new TypeReference<HashMap<String,Object>>(){});
System.out.println("Output Map: "+resultMap);
for (String key : resultMap.keySet()) {
Object routings= resultMap.get(key);
System.out.println(routings);
}
} catch (IOException e) {
e.printStackTrace();
}
}
你'表的结构simple.json'只是描述。而'employeeId'只会有单一的价值。你如何去迭代单个值? –
我想从使用键集的两个表中检索所有列值。 – dev777
这里,路由是我的价值。从价值,我应该再次分裂成关键,价值pairs.Iow我可以做 – dev777