SQLite存储的数据读出来可能是String ，但是我们需要的是Date，就会出现转化异常
在不改动生产代码的前提下进行修改代码
public class MyRecordBuilder extends RecordBuilder {
@Override
public List<Record> build(Config config, ResultSet rs, Function<Record, Boolean> func) throws SQLException {
List<Record> result = new ArrayList<>();
ResultSetMetaData rsmd = rs.getMetaData();
int columnCount = rsmd.getColumnCount();
String[] labelNames = new String[columnCount + 1];
int[] types = new int[columnCount + 1];
buildLabelNamesAndTypes(rsmd, labelNames, types);
while (rs.next()) {
Record record = new Record();
CPI.setColumnsMap(record, config.getContainerFactory().getColumnsMap());
Map<String, Object> columns = record.getColumns();
for (int i = 1; i <= columnCount; i++) {
Object value;
if (types[i] < Types.BLOB) {
value = rs.getObject(i);
if(value!=null&&!"".equals(value)){
if (types[i] == Types.DATE) {//91 SQLite读到的数据是Date或者是TIMESTAMP，展现出来的是String
if(value instanceof String){//说明时间类型数据，需转成Date
value = changeDate(value.toString());
}
}else if (types[i] == Types.TIMESTAMP) {//93
if(value instanceof String){//说明时间类型数据，需转成Date
value = changeDate(value.toString());
}
}
}
} else {
if (types[i] == Types.CLOB) {
value = ModelBuilder.me.handleClob(rs.getClob(i));
} else if (types[i] == Types.NCLOB) {
value = ModelBuilder.me.handleClob(rs.getNClob(i));
} else if (types[i] == Types.BLOB) {
value = rs.getBytes(i);
} else {
value = rs.getObject(i);
}
}
columns.put(labelNames[i], value);
}
if (func == null) {
result.add(record);
} else {
if (!func.apply(record)) {
break;
}
}
}
return result;
}
}public class MyModelBuilder extends ModelBuilder {
@SuppressWarnings({"unchecked"})
public <T> List<T> build(ResultSet rs, Class<? extends Model> modelClass, Function<T, Boolean> func) throws SQLException, ReflectiveOperationException {
List<T> result = new ArrayList<>();
ResultSetMetaData rsmd = rs.getMetaData();
int columnCount = rsmd.getColumnCount();
String[] labelNames = new String[columnCount + 1];
int[] types = new int[columnCount + 1];
buildLabelNamesAndTypes(rsmd, labelNames, types);
while (rs.next()) {
Model<?> ar = modelClass.newInstance();
Map<String, Object> attrs = CPI.getAttrs(ar);
for (int i=1; i<=columnCount; i++) {
Object value;
if (types[i] < Types.BLOB) {
value = rs.getObject(i);
if(value!=null&&!"".equals(value)){
if (types[i] == Types.DATE) {//91 SQLite读到的数据是Date或者是TIMESTAMP，展现出来的是String
if(value instanceof String){//说明时间类型数据，需转成Date
value = changeDate(value.toString());
}
}else if (types[i] == Types.TIMESTAMP) {//93
if(value instanceof String){//说明时间类型数据，需转成Date
value = changeDate(value.toString());
}
}
}
} else {
if (types[i] == Types.CLOB) {
value = handleClob(rs.getClob(i));
} else if (types[i] == Types.NCLOB) {
value = handleClob(rs.getNClob(i));
} else if (types[i] == Types.BLOB) {
value = rs.getBytes(i);
} else {
value = rs.getObject(i);
}
}
attrs.put(labelNames[i], value);
}
if (func == null) {
result.add((T)ar);
} else {
if ( ! func.apply((T)ar) ) {
break ;
}
}
}
return result;
}
public static Date changeDate(String str) {
String[] formats = {"yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm:ss.SSS", "yyyy-MM-dd"};
for (String format : formats) {
try {
SimpleDateFormat sdf = new SimpleDateFormat(format);
Date date = sdf.parse(str);
return date;
} catch (ParseException e) {
// 如果解析失败，尝试下一个格式
}
}
return null;
}
}package com.jfinal.plugin.activerecord.dialect;
import com.jfinal.plugin.activerecord.CPI;
import com.jfinal.plugin.activerecord.Record;
import com.jfinal.plugin.activerecord.Table;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* @author wuqiujiang
* @date 2025/7/16 12:25
* @desc
*/
public class CustomSqlite3Dialect extends Sqlite3Dialect {
@Override
protected void fillStatementHandleDateType(PreparedStatement pst, List<Object> paras) throws SQLException {
for (int i = 0; i < paras.size(); i++) {
Object para = paras.get(i);
if (para instanceof Date) {
// 将 Date 转换为 SQLite 支持的字符串格式
para = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(para);
}
pst.setObject(i + 1, para);
}
}
@Override
public void forModelUpdate(Table table, Map<String, Object> attrs, Set<String> modifyFlag, StringBuilder sql, List<Object> paras) {
sql.append("update ").append(table.getName()).append(" set ");
String[] pKeys = table.getPrimaryKey();
Iterator var7 = attrs.entrySet().iterator();
while(var7.hasNext()) {
Map.Entry<String, Object> e = (Map.Entry)var7.next();
String colName = (String)e.getKey();
if (modifyFlag.contains(colName) && !this.isPrimaryKey(colName, pKeys) && table.hasColumnLabel(colName)) {
if (paras.size() > 0) {
sql.append(", ");
}
sql.append(colName).append(" = ? ");
Object val = e.getValue();
if (val instanceof Date) {
val = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format((Date) val);
}
paras.add(val);
}
}
sql.append(" where ");
for(int i = 0; i < pKeys.length; ++i) {
if (i > 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
paras.add(attrs.get(pKeys[i]));
}
}
@Override
public void forDbSave(String tableName, String[] pKeys, Record record, StringBuilder sql, List<Object> paras) {
tableName = tableName.trim();
this.trimPrimaryKeys(pKeys);
sql.append("insert into ");
sql.append(tableName).append('(');
StringBuilder temp = new StringBuilder();
temp.append(") values(");
Iterator var7 = record.getColumns().entrySet().iterator();
while(var7.hasNext()) {
Map.Entry<String, Object> e = (Map.Entry)var7.next();
if (paras.size() > 0) {
sql.append(", ");
temp.append(", ");
}
sql.append((String)e.getKey());
temp.append('?');
Object val = e.getValue();
if (val instanceof Date) {
val = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format((Date) val);
}
paras.add(val);
}
sql.append(temp.toString()).append(')');
}
@Override
public void forDbUpdate(String tableName, String[] pKeys, Object[] ids, Record record, StringBuilder sql, List<Object> paras) {
tableName = tableName.trim();
this.trimPrimaryKeys(pKeys);
Set<String> modifyFlag = CPI.getModifyFlag(record);
sql.append("update ").append(tableName).append(" set ");
Iterator var8 = record.getColumns().entrySet().iterator();
while(var8.hasNext()) {
Map.Entry<String, Object> e = (Map.Entry)var8.next();
String colName = (String)e.getKey();
if (modifyFlag.contains(colName) && !this.isPrimaryKey(colName, pKeys)) {
if (paras.size() > 0) {
sql.append(", ");
}
sql.append(colName).append(" = ? ");
Object val = e.getValue();
if (val instanceof Date) {
val = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format((Date) val);
}
paras.add(val);
}
}
sql.append(" where ");
for(int i = 0; i < pKeys.length; ++i) {
if (i > 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
paras.add(ids[i]);
}
}
}