/* =========================================
* 根据ID查询
* ========================================= */
@Override
public Map<String, Object> findById(Class<?> clzz, Serializable id) {
String prefix = dbConfig.getPrefix(); // 表前缀
String tableName = clzz.getAnnotation(Entity.class).value();
String primaryKey = clzz.getAnnotation(Entity.class).key();
StringBuilder sql = new StringBuilder();
sql.append("select * from ")
.append(prefix)
.append(tableName)
.append(" where ")
.append(primaryKey)
.append("=?");
return queryForMapNoException(sql.toString(), id);
}
// 更新数据
public boolean update(Object entity) {
String prefix = dbConfig.getPrefix();
Class<?> clzz = entity.getClass();
Entity tableInfo = clzz.getAnnotation(Entity.class);
String tableName = tableInfo.value();
String primaryKey = tableInfo.key();
StringBuffer sql = new StringBuffer();
sql.append("update `").append(prefix).append(tableName).append("` set ");
List<Object> list = null;
int id = 0;
try {
id = (Integer) clzz.getMethod("getId").invoke(entity);
Field[] fields = clzz.getDeclaredFields();
int length = fields.length;
list = new ArrayList<Object>(length);
for (int i = 0; i < length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if (fieldName.equals(primaryKey)) { // 如果是主键
continue;
}
if ("serialVersionUID".equals(fieldName)) {
continue;
}
String methodName =
"get"
+ fieldName.replaceFirst(
fieldName.charAt(0) + "", (char) (fieldName.charAt(0) - 32) + "");
Method me = clzz.getMethod(methodName);
Object returnObject = me.invoke(entity);
if (returnObject != null) { // 如果返回值为null
sql.append("`" + fieldName + "`").append("=?");
list.add(returnObject);
sql.append(",");
}
}
sql = new StringBuffer(sql.substring(0, sql.length() - 1));
} catch (Exception e) {
e.printStackTrace();
}
list.add(id);
sql.append(" where `").append(primaryKey).append("`=?");
return update(sql.toString(), list.toArray());
}
// 批量删除
@Override
public boolean deleteByIds(Class<?> clzz, String ids) {
String prefix = dbConfig.getPrefix(); // 表前缀
MapConfig map = null;
try {
map = cache.getMapConfig(clzz);
} catch (Exception e1) {
e1.printStackTrace();
}
StringBuilder sql = new StringBuilder();
sql.append("delete from ")
.append(prefix)
.append(map.getTableName())
.append(" where ")
.append(map.getPrimaryKey())
.append(" in(")
.append(ids)
.append(")");
logger(sql.toString());
return jdbcTemplate.update(sql.toString()) > 0 ? true : false;
}
/**
* 数据库操作对象引擎 实现：基于Spring的JDBCTemplate开发的通用对象。 目的：简化数据库代码 最新采用slf4j日志接口
*
* @author marker
* @date 2014-08-10
* @version 1.0
* @blog www.yl-blog.com
* @weibo http://t.qq.com/wuweiit
*/
public abstract class DaoEngine implements ISupportDao {
/** 日志记录器 */
protected Logger logger = LoggerFactory.getLogger(LOG.DAOENGINE);
/** 数据库配置 */
protected static final DataBaseConfig dbConfig = DataBaseConfig.getInstance();
/** 自动注入jdbc模板操作 */
@Autowired protected JdbcTemplate jdbcTemplate;
/** 基本信息缓存 */
private static final EntityInfoCache cache = new EntityInfoCache();
/**
* 泛型构造方法目的是为了简化实现
*
* @param t
*/
public DaoEngine() {}
/*
* ==================================================================
* 数据查询接口实现
* ==================================================================
*/
// 查询单个对象实现
@Override
public Map<String, Object> queryForMap(String sql, Object... args) {
logger(sql);
return jdbcTemplate.queryForMap(sql, args);
}
// 查询对象集合实现
@Override
public List<Map<String, Object>> queryForList(String sql, Object... args) {
logger(sql);
return jdbcTemplate.queryForList(sql, args);
}
// 查询对象
@Override
public <T> T queryForObject(String sql, Class<T> clzz, Object... args) {
logger(sql);
return jdbcTemplate.queryForObject(sql, clzz, args);
}
/*
* ==================================================================
* 数据更新接口实现
* ==================================================================
*/
// 批量更新
@Override
public int[] batchUpdate(String sql, List<Object[]> batchArgs) {
logger(sql);
return jdbcTemplate.batchUpdate(sql, batchArgs);
}
// 更新数据
@Override
public boolean update(String sql, Object... args) {
logger(sql);
return jdbcTemplate.update(sql, args) > 0 ? true : false;
}
/*
* ==================================================================
* 数据删除接口实现
* ==================================================================
*/
// 批量删除
@Override
public boolean deleteByIds(Class<?> clzz, String ids) {
String prefix = dbConfig.getPrefix(); // 表前缀
MapConfig map = null;
try {
map = cache.getMapConfig(clzz);
} catch (Exception e1) {
e1.printStackTrace();
}
StringBuilder sql = new StringBuilder();
sql.append("delete from ")
.append(prefix)
.append(map.getTableName())
.append(" where ")
.append(map.getPrimaryKey())
.append(" in(")
.append(ids)
.append(")");
logger(sql.toString());
return jdbcTemplate.update(sql.toString()) > 0 ? true : false;
}
// 批量删除
@Override
public boolean deleteByIds(String tableName, String key, String ids) {
StringBuilder sql = new StringBuilder();
sql.append("delete from ")
.append(tableName)
.append(" where ")
.append(key)
.append(" in(")
.append(ids)
.append(")");
logger(sql.toString());
return jdbcTemplate.update(sql.toString()) > 0 ? true : false;
}
/* =========================================
* 根据ID查询
* ========================================= */
@Override
public Map<String, Object> findById(Class<?> clzz, Serializable id) {
String prefix = dbConfig.getPrefix(); // 表前缀
String tableName = clzz.getAnnotation(Entity.class).value();
String primaryKey = clzz.getAnnotation(Entity.class).key();
StringBuilder sql = new StringBuilder();
sql.append("select * from ")
.append(prefix)
.append(tableName)
.append(" where ")
.append(primaryKey)
.append("=?");
return queryForMapNoException(sql.toString(), id);
}
// 无异常查询
private Map<String, Object> queryForMapNoException(String sql, Object... args) {
try {
logger(sql);
return jdbcTemplate.queryForMap(sql, args);
} catch (Exception e) {
}
return new HashMap<String, Object>();
}
// 分页查询
@Override
public Page findByPage(int currentPageNo, int pageSize, String sql, Object... args) {
int beginPos = sql.toLowerCase().indexOf("from");
String hql4Count = "select count(*) " + sql.substring(beginPos);
sql += " limit " + (currentPageNo - 1) * pageSize + "," + pageSize;
// 获取总条数
int totalRows = jdbcTemplate.queryForObject(hql4Count, Integer.class, args);
List<Map<String, Object>> data = queryForList(sql, args);
Page page = new Page(currentPageNo, totalRows, pageSize);
page.setData(data); // 获取数据集合
return page;
}
// 保存对象
public boolean save(Object entity) {
String prefix = dbConfig.getPrefix();
Class<?> clzz = entity.getClass();
MapConfig map = null;
try {
map = cache.getMapConfig(clzz);
} catch (Exception e1) {
e1.printStackTrace();
}
// 构造SQL字符串
StringBuilder sql = new StringBuilder("insert into ");
sql.append(prefix).append(map.getTableName()).append("(");
StringBuilder val = new StringBuilder(" values(");
Field[] fields = clzz.getDeclaredFields();
int length = fields.length;
final List<Object> list = new ArrayList<Object>(length);
for (int i = 0; i < length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if (fieldName.equals(map.getPrimaryKey())) { // 如果是主键
continue;
}
if ("serialVersionUID".equals(fieldName)) {
continue;
}
String methodName =
"get"
+ fieldName.replaceFirst(
fieldName.charAt(0) + "", (char) (fieldName.charAt(0) - 32) + "");
Method me = null;
try {
me = clzz.getMethod(methodName);
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
Object returnObject = null;
try {
returnObject = me.invoke(entity);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} //
if (returnObject != null) { // 如果返回值为null
sql.append("`" + fieldName + "`");
val.append("?");
list.add(returnObject);
sql.append(",");
val.append(",");
}
}
final StringBuilder sql2 = new StringBuilder(sql.substring(0, sql.length() - 1));
StringBuilder val2 = new StringBuilder(val.substring(0, val.length() - 1));
sql2.append(")").append(val2).append(")");
KeyHolder holder = new GeneratedKeyHolder();
this.jdbcTemplate.update(
new PreparedStatementCreator() {
@Override
public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
PreparedStatement ps = con.prepareStatement(sql2.toString());
Object[] params = list.toArray();
for (int i = 0; i < params.length; i++) {
ps.setObject(i + 1, params[i]);
}
return ps;
}
},
holder);
try {
Method me = clzz.getMethod("setId", Integer.class);
me.invoke(entity, holder.getKey().intValue());
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
// 更新数据
public boolean update(Object entity) {
String prefix = dbConfig.getPrefix();
Class<?> clzz = entity.getClass();
Entity tableInfo = clzz.getAnnotation(Entity.class);
String tableName = tableInfo.value();
String primaryKey = tableInfo.key();
StringBuffer sql = new StringBuffer();
sql.append("update `").append(prefix).append(tableName).append("` set ");
List<Object> list = null;
int id = 0;
try {
id = (Integer) clzz.getMethod("getId").invoke(entity);
Field[] fields = clzz.getDeclaredFields();
int length = fields.length;
list = new ArrayList<Object>(length);
for (int i = 0; i < length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if (fieldName.equals(primaryKey)) { // 如果是主键
continue;
}
if ("serialVersionUID".equals(fieldName)) {
continue;
}
String methodName =
"get"
+ fieldName.replaceFirst(
fieldName.charAt(0) + "", (char) (fieldName.charAt(0) - 32) + "");
Method me = clzz.getMethod(methodName);
Object returnObject = me.invoke(entity);
if (returnObject != null) { // 如果返回值为null
sql.append("`" + fieldName + "`").append("=?");
list.add(returnObject);
sql.append(",");
}
}
sql = new StringBuffer(sql.substring(0, sql.length() - 1));
} catch (Exception e) {
e.printStackTrace();
}
list.add(id);
sql.append(" where `").append(primaryKey).append("`=?");
return update(sql.toString(), list.toArray());
}
// 查询某页数据
@Override
public List<Map<String, Object>> queryFotList(
int currentPageNo, int pageSize, String sql, Object... args) {
sql += " limit " + (currentPageNo - 1) * pageSize + "," + pageSize;
logger(sql);
return jdbcTemplate.queryForList(sql, args);
}
/**
* 获取数据库前缀
*
* @return
*/
protected String getPreFix() {
return dbConfig.getPrefix();
}
/**
* 日志打印方法 如果是数据库开发模式，方可打印日志
*
* @param info
*/
protected void logger(String info, Object... params) {
if (dbConfig.isDebug()) { // debug模式输入SQL语句
info = SQLUtil.format(info);
logger.info(info, params);
}
}
}
/**
* 日志打印方法 如果是数据库开发模式，方可打印日志
*
* @param info
*/
protected void logger(String info, Object... params) {
if (dbConfig.isDebug()) { // debug模式输入SQL语句
info = SQLUtil.format(info);
logger.info(info, params);
}
}
/**
* 获取数据库前缀
*
* @return
*/
protected String getPreFix() {
return dbConfig.getPrefix();
}
// 保存对象
public boolean save(Object entity) {
String prefix = dbConfig.getPrefix();
Class<?> clzz = entity.getClass();
MapConfig map = null;
try {
map = cache.getMapConfig(clzz);
} catch (Exception e1) {
e1.printStackTrace();
}
// 构造SQL字符串
StringBuilder sql = new StringBuilder("insert into ");
sql.append(prefix).append(map.getTableName()).append("(");
StringBuilder val = new StringBuilder(" values(");
Field[] fields = clzz.getDeclaredFields();
int length = fields.length;
final List<Object> list = new ArrayList<Object>(length);
for (int i = 0; i < length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if (fieldName.equals(map.getPrimaryKey())) { // 如果是主键
continue;
}
if ("serialVersionUID".equals(fieldName)) {
continue;
}
String methodName =
"get"
+ fieldName.replaceFirst(
fieldName.charAt(0) + "", (char) (fieldName.charAt(0) - 32) + "");
Method me = null;
try {
me = clzz.getMethod(methodName);
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
Object returnObject = null;
try {
returnObject = me.invoke(entity);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} //
if (returnObject != null) { // 如果返回值为null
sql.append("`" + fieldName + "`");
val.append("?");
list.add(returnObject);
sql.append(",");
val.append(",");
}
}
final StringBuilder sql2 = new StringBuilder(sql.substring(0, sql.length() - 1));
StringBuilder val2 = new StringBuilder(val.substring(0, val.length() - 1));
sql2.append(")").append(val2).append(")");
KeyHolder holder = new GeneratedKeyHolder();
this.jdbcTemplate.update(
new PreparedStatementCreator() {
@Override
public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
PreparedStatement ps = con.prepareStatement(sql2.toString());
Object[] params = list.toArray();
for (int i = 0; i < params.length; i++) {
ps.setObject(i + 1, params[i]);
}
return ps;
}
},
holder);
try {
Method me = clzz.getMethod("setId", Integer.class);
me.invoke(entity, holder.getKey().intValue());
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
