找了半天没有找到postgresql中关于array数组类型的字段如何对应到java中的数据类型，后来找到了mybatis的TypeHandler，只要实现一个自定义的TypeHandler就行了，如下，
我定义了几个基础数据类型的数组
public class ArrayTypeHandler extends BaseTypeHandler<Object[]> {
private static final String TYPE_NAME_VARCHAR = "varchar";
private static final String TYPE_NAME_INTEGER = "integer";
private static final String TYPE_NAME_BOOLEAN = "boolean";
private static final String TYPE_NAME_NUMERIC = "numeric";
@Override
public void setNonNullParameter(PreparedStatement ps, int i, Object[] parameter, JdbcType jdbcType) throws SQLException {
String typeName = null;
if (parameter instanceof Integer[]) {
typeName = TYPE_NAME_INTEGER;
} else if (parameter instanceof String[]) {
typeName = TYPE_NAME_VARCHAR;
} else if (parameter instanceof Boolean[]) {
typeName = TYPE_NAME_BOOLEAN;
} else if (parameter instanceof Double[]) {
typeName = TYPE_NAME_NUMERIC;
}
if (typeName == null) {
throw new TypeException("ArrayTypeHandler parameter typeName error, your type is " + parameter.getClass().getName());
}
// 这3行是关键的代码，创建Array，然后ps.setArray(i, array)就可以了
Connection conn = ps.getConnection();
Array array = conn.createArrayOf(typeName, parameter);
ps.setArray(i, array);
}
@Override
public Object[] getNullableResult(ResultSet resultSet, String s) throws SQLException {
return getArray(resultSet.getArray(s));
}
@Override
public Object[] getNullableResult(ResultSet resultSet, int i) throws SQLException {
return getArray(resultSet.getArray(i));
}
@Override
public Object[] getNullableResult(CallableStatement callableStatement, int i) throws SQLException {
return getArray(callableStatement.getArray(i));
}
private Object[] getArray(Array array) {
if (array == null) {
return null;
}
try {
return (Object[]) array.getArray();
} catch (Exception e) {
}
return null;
}
}
然后在实体类里面对应的字段配置这个转换器就行，如果是配置文件需要在 xxmap.xml中配置对应属性
@ColumnType(typeHandler = com.mvc.typehandler.ArrayTypeHandler.class)
private String[] cities; //所操作的城市code列表，为空表示所有城市
@ColumnType(typeHandler = com.mvc.typehandler.ArrayTypeHandler.class)
private String[] areaTypes; //操作的行业类型code列表，为空表示所有行业
@ColumnType(typeHandler = com.jmtool.mvc.typehandler.ArrayTypeHandler.class)
private Integer[] targetStatus; //操作的目标数据状态java mybatis操作 postgresql array数组类型备忘
postgrey sql数据库字段类型varchar[],java使用String[]类型，自定义ArrayTypeHandler
ArrayTypeHandler.java
public class ArrayTypeHandler extends BaseTypeHandler<Object[]> {
private static final String TYPE_NAME_VARCHAR = "varchar";
private static final String TYPE_NAME_INTEGER = "integer";
private static final String TYPE_NAME_BOOLEAN = "boolean";
private static final String TYPE_NAME_NUMERIC = "numeric";
@Override
public void setNonNullParameter(PreparedStatement ps, int i, Object[] parameter, JdbcType jdbcType) throws SQLException {
String typeName = null;
if (parameter instanceof Integer[]) {
typeName = TYPE_NAME_INTEGER;
} else if (parameter instanceof String[]) {
typeName = TYPE_NAME_VARCHAR;
} else if (parameter instanceof Boolean[]) {
typeName = TYPE_NAME_BOOLEAN;
} else if (parameter instanceof Double[]) {
typeName = TYPE_NAME_NUMERIC;
}
if (typeName == null) {
throw new TypeException("ArrayTypeHandler parameter typeName error, your type is " + parameter.getClass().getName());
}
// 这3行是关键的代码，创建Array，然后ps.setArray(i, array)就可以了
Connection conn = ps.getConnection();
Array array = conn.createArrayOf(typeName, parameter);
ps.setArray(i, array);
}
@Override
public Object[] getNullableResult(ResultSet resultSet, String s) throws SQLException {
return getArray(resultSet.getArray(s));
}
@Override
public Object[] getNullableResult(ResultSet resultSet, int i) throws SQLException {
return getArray(resultSet.getArray(i));
}
@Override
public Object[] getNullableResult(CallableStatement callableStatement, int i) throws SQLException {
return getArray(callableStatement.getArray(i));
}
private Object[] getArray(Array array) {
if (array == null) {
return null;
}
try {
return (Object[]) array.getArray();
} catch (Exception e) {
}
return null;
}
}
配置文件中映射配置，增加typeHandler属性，填写ArrayTypeHandler.java的全路径。
<result column="source_type" jdbcType="ARRAY" property="sourceType" typeHandler="com.wang.common.ArrayTypeHandler" />用到的SQL：
<insert id="insert" parameterType="com.wang.pojo.Qzf">
insert into t_qz_qzf(id,source_type)
values
(#{id,jdbcType=VARCHAR},#{sourceType,jdbcType=ARRAY,typeHandler="com.wang.common.ArrayTypeHandler"})
</insert>以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
