我想在数据库表中存储一些属性。我正在使用 Apache Commons Configuration 2.1 。我找到了this,但我无法让它发挥作用......
我已经用Google搜索了,但我还没有找到任何文档或示例,而是我上面写的链接。
(编辑:代码现已修复)
这是数据库结构(postgresql):
-- Table: public.propcalendars
-- DROP TABLE public.propcalendars;
CREATE TABLE public.propcalendars
(
name character varying NOT NULL,
key character varying NOT NULL,
value character varying,
CONSTRAINT pk PRIMARY KEY (name, key)
)
WITH (
OIDS=FALSE
);
ALTER TABLE public.propcalendars
OWNER TO postgres;
存储以下数据:
name key value
diasemana SV2 0000010
fechafinal SV2 31/08
fechainicial SV2 01/07
这是我的代码:
public class PropertiesConfiguration {
/*
* Atributos
*/
private static PropertiesConfiguration INSTANCE = null;
private DatabaseConfiguration configFechaInicioAnual;
private DatabaseConfiguration configFechaFinAnual;
private DatabaseConfiguration configDiasSemana;
/*
* Métodos
*/
private PropertiesConfiguration() throws ConfigurationException {
configure();
}
private void configure() throws ConfigurationException {
PGSimpleDataSource postgres = new PGSimpleDataSource();
postgres.setServerName("ip");
postgres.setDatabaseName("database");
postgres.setPortNumber(5433);
postgres.setUser("user");
postgres.setPassword("***");
postgres.setCurrentSchema("public");
BasicConfigurationBuilder<DatabaseConfiguration> builder = new BasicConfigurationBuilder<DatabaseConfiguration>(DatabaseConfiguration.class);
builder.configure(
new Parameters()
.database()
.setDataSource(postgres)
.setTable("propcalendars")
.setKeyColumn("key")
.setValueColumn("value")
.setConfigurationNameColumn("name")
.setConfigurationName("fechainicial")
);
configFechaInicioAnual = new DatabaseConfiguration();
configFechaInicioAnual.setDataSource(postgres);
configFechaInicioAnual.setKeyColumn("key");
configFechaInicioAnual.setValueColumn("value");
configFechaInicioAnual.setConfigurationName("fechainicial");
}
public static PropertiesConfiguration getInstance() throws ConfigurationException{
if(INSTANCE == null){
INSTANCE = new PropertiesConfiguration();
}
return INSTANCE;
}
public DatosCalendario getInfoCalendario(String pClaveCalendario, String pInfoCalendario){
DatosCalendario dc = new DatosCalendario();
dc.descripcion = pInfoCalendario;
dc.inicio = configFechaInicioAnual.getString(pClaveCalendario);
dc.fin = "";//configFechaInicioAnual.getString(pClaveCalendario);
dc.diasSemana = 1;//configFechaInicioAnual.getInt(pClaveCalendario);
return dc;
}
public class DatosCalendario{
public String descripcion;
public String inicio;
public String fin;
public Integer diasSemana;
@Override
public String toString(){
return " DatosCalendario [ descripcion=" + descripcion + ", inicio=" + inicio + ", fin=" + fin + ", diasSemana=" + diasSemana + "]";
}
}
}
这是获得&#39; SV2&#39;与&#39; fechainicial&#39;:
java.sql.SQLSyntaxErrorException:SQL语法中有错误;检查与您的MySQL服务器版本相对应的手册,以便在#&quot; null&lt ;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在第1行 在com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:686)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:663)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:653)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:115)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2041)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在com.mysql.cj.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1827)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在com.mysql.cj.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1930)〜[mysql-connector-java-6.0.3.jar:6.0.3] 在org.apache.commons.configuration2.DatabaseConfiguration $ JdbcOperation.openResultSet(DatabaseConfiguration.java:847)〜[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.DatabaseConfiguration $ 1.performOperation(DatabaseConfiguration.java:333)〜[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.DatabaseConfiguration $ JdbcOperation.execute(DatabaseConfiguration.java:742)[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.DatabaseConfiguration.getPropertyInternal(DatabaseConfiguration.java:359)[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.AbstractConfiguration.getProperty(AbstractConfiguration.java:992)[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.AbstractConfiguration.getAndConvertProperty(AbstractConfiguration.java:1749)[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.AbstractConfiguration.convert(AbstractConfiguration.java:1785)[commons-configuration2-2.1.jar:2.1] 在org.apache.commons.configuration2.AbstractConfiguration.getString(AbstractConfiguration.java:1344)[commons-configuration2-2.1.jar:2.1] 在com.ingartek.gtfs.bizkaibus.configuration.PropertiesConfiguration.getInfoCalendario(PropertiesConfiguration.java:83)[classes /:?] 在com.ingartek.gtfs.bizkaibus.main.GenerarGtfs.main(GenerarGtfs.java:43)[classes /:?] 13:55:15.120 [主要] DEBUG com.ingartek.gtfs.bizkaibus.main.GenerarGtfs - DatosCalendario [descripcion = Sabados verano Julio Agosto,inicio = null,fin =,diasSemana = 1]
我做错了什么?有人可以提供额外的教程或文档吗?
解
正如@Thilo告诉我的那样,解决方案是使用一个表名而不包含一个&#34;连字符&#34; (&#34; - &#34)。不幸的是,它只在PostgreSQL和MySQL中工作我得到了例外:
java.sql.SQLSyntaxErrorException:SQL语法中有错误;检查与您的MySQL服务器版本相对应的手册,以便在&#39; key =&#39; SV2&#39;附近使用正确的语法。 AND name =&#39; fechainicial&#39;&#39;在第1行
答案 0 :(得分:1)
我在使用mysql时遇到了同样的问题
经过我们的调试后,我通过重命名&#39;键&#39;中的 KeyColumn 名称解决了这个问题。代码&#39;您可以使用其他一些列名,但不能使用&#39;键&#39;