1、sqlite默認使用UTF-8編碼,從數據庫(UTF-8)查出來的時候遍歷ResultSet時候一定使用：rs.getBytes(columnName),不能使用re.getString(XXX)

public static String resultSetToJson(ResultSet rs) throws SQLException, JSONException, UnsupportedEncodingException {

// json數組

JSONArray array = new JSONArray();

// 獲取列數

ResultSetMetaData metaData = rs.getMetaData();

int columnCount = metaData.getColumnCount();

// 遍歷ResultSet中的每條數據

while (rs.next()) {

JSONObject jsonObj = new JSONObject();

// 遍歷每一列

for (int i = 1; i <= columnCount; i++) {

String value = null;

String columnName = metaData.getColumnLabel(i);//列名稱

if (rs.getString(columnName) != null&&!rs.getString(columnName).equals("")) {

value = new String(rs.getBytes(columnName));//列的值,有數據則轉碼

} else {

value = "";//列的值,為空,直接取出去 } jsonObj.put(columnName, value);}

array.add(jsonObj); } return array.toString();}

2、Sqlite報錯 not implemented by SQLite JDBC driver,參照下面代碼解決

/**執行插入和更改操作,無返回ResultSetpublic static void updateUser() throws Exception {

String rs = SqliteDB.GetHtttpLink("http://127.0.0.1:18181/db/upuser");

JSONArray array = JSONArray.parseArray(rs);

for (int i = 0; i < array.size(); i++) {

JSONObject obj = array.getJSONObject(i);

int id = Integer.parseInt(obj.getString("id"));

String sql = "insert into user values(?,?,?,?,?,?,?,?)";

Connection con = SqliteDB.getCon();

PreparedStatement pst = con.prepareStatement(sql);

pst.setInt(1, id);

pst.addBatch();//注意此種形式可以解決報錯

pst.executeBatch(); }}注意此種形式可以解決報錯

/**執行查詢操作

public static void selectUser() throws SQLException {

Connection connection = SqliteDB.getCon();

PreparedStatement pst = connection.prepareStatement("select comment from user;");

ResultSet resultSet = pst.executeQuery();//后面這個不能帶sql

while (resultSet.next()) {

String s = resultSet.getString("comment");

}}