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移除ListStringTypeHandler类，添加通用的GenericListTypeHandler类以支持多种类型的列表处理

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dftre 2025-02-26 15:36:43 +08:00
parent a6a822e39e
commit 631dd2f5c3
3 changed files with 134 additions and 44 deletions
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131
ruoyi-common/src/main/java/com/ruoyi/common/handler/GenericListTypeHandler.java Normal file
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@ -0,0 +1,131 @@
package com.ruoyi.common.handler;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import com.ruoyi.common.utils.StringUtils;
/**
* 通用的List类型处理器，可处理任何元素类型
*
* 用法示例：
* 1. 在XML中配置：
* {@code <result column="tags" property="tags"
* typeHandler=
"com.ruoyi.generator.handler.GenericListTypeHandler$StringList"/>}
*
* 2. 在字段上使用注解：
* {@code @Result(column="tags", property="tags",
* typeHandler=GenericListTypeHandler.StringList.class)}
*
* 3. 在xml插值语法中使用
* {@code #{tags,typeHandler=com.ruoyi.common.handler.GenericListTypeHandler$StringList}
* }
*
* @param <T> 列表元素类型
*/
public class GenericListTypeHandler<T> extends BaseTypeHandler<List<T>> {
private final Function<String, T> converter;
/**
* 构造函数
*
* @param converter 字符串到元素类型T的转换器
*/
protected GenericListTypeHandler(Function<String, T> converter) {
this.converter = converter;
}
@Override
public void setNonNullParameter(PreparedStatement ps, int i, List<T> parameter, JdbcType jdbcType)
throws SQLException {
String value = StringUtils.join(parameter, ",");
ps.setString(i, value);
}
@Override
public List<T> getNullableResult(ResultSet rs, String columnName) throws SQLException {
return convertToList(rs.getString(columnName));
}
@Override
public List<T> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
return convertToList(rs.getString(columnIndex));
}
@Override
public List<T> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
return convertToList(cs.getString(columnIndex));
}
private List<T> convertToList(String value) {
if (StringUtils.isBlank(value)) {
return null;
}
List<T> list = new ArrayList<>();
String[] items = value.split(",");
for (String item : items) {
if (StringUtils.isNotBlank(item)) {
list.add(converter.apply(item.trim()));
}
}
return list;
}
// 内部类 - 常用类型的TypeHandler实现
/**
* String类型列表的TypeHandler
*/
public static class StringList extends GenericListTypeHandler<String> {
public StringList() {
super(String::valueOf);
}
}
/**
* Integer类型列表的TypeHandler
*/
public static class IntegerList extends GenericListTypeHandler<Integer> {
public IntegerList() {
super(Integer::valueOf);
}
}
/**
* Long类型列表的TypeHandler
*/
public static class LongList extends GenericListTypeHandler<Long> {
public LongList() {
super(Long::valueOf);
}
}
/**
* Double类型列表的TypeHandler
*/
public static class DoubleList extends GenericListTypeHandler<Double> {
public DoubleList() {
super(Double::valueOf);
}
}
/**
* Boolean类型列表的TypeHandler
*/
public static class BooleanList extends GenericListTypeHandler<Boolean> {
public BooleanList() {
super(Boolean::valueOf);
}
}
}

41
ruoyi-models/ruoyi-generator/src/main/java/com/ruoyi/generator/handler/ListStringTypeHandler.java
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@ -1,41 +0,0 @@
package com.ruoyi.generator.handler;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import com.ruoyi.common.utils.StringUtils;
public class ListStringTypeHandler extends BaseTypeHandler<List<String>> {
@Override
public void setNonNullParameter(PreparedStatement ps, int i, List<String> parameter, JdbcType jdbcType)
throws SQLException {
String value = StringUtils.join(parameter, ",");
ps.setString(i, value);
}
@Override
public List<String> getNullableResult(ResultSet rs, String columnName) throws SQLException {
String value = rs.getString(columnName);
return StringUtils.isBlank(value) ? null : StringUtils.str2List(value, ",", true, true);
}
@Override
public List<String> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
String value = rs.getString(columnIndex);
return StringUtils.isBlank(value) ? null : StringUtils.str2List(value, ",", true, true);
}
@Override
public List<String> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
String value = cs.getString(columnIndex);
return StringUtils.isBlank(value) ? null : StringUtils.str2List(value, ",", true, true);
}
}

6
ruoyi-models/ruoyi-generator/src/main/resources/mapper/generator/GenJoinTableMapper.xml
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@ -15,7 +15,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
<result property="joinType" column="join_type" />
<result property="orderNum" column="order_num"/>
<result property="newTableId" column="new_table_id"/>
<result property="joinColumns" column="join_columns" typeHandler="com.ruoyi.generator.handler.ListStringTypeHandler"/>
<result property="joinColumns" column="join_columns" typeHandler="com.ruoyi.common.handler.GenericListTypeHandler$StringList"/>
</resultMap>
<sql id="selectGenJoinTableVo">
@ -63,7 +63,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
<if test="leftTableFk != null">#{leftTableFk},</if>
<if test="rightTableFk != null">#{rightTableFk},</if>
<if test="joinType != null">#{joinType},</if>
<if test="joinColumns != null">#{joinColumns,typeHandler=com.ruoyi.generator.handler.ListStringTypeHandler},</if>
<if test="joinColumns != null">#{joinColumns,typeHandler=com.ruoyi.common.handler.GenericListTypeHandler$StringList},</if>
<if test="orderNum != null">#{orderNum},</if>
<if test="newTableId != null">#{newTableId},</if>
</trim>
@ -79,7 +79,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
<if test="leftTableFk != null"> left_table_fk = #{leftTableFk},</if>
<if test="rightTableFk != null"> right_table_fk = #{rightTableFk},</if>
<if test="joinType != null">join_type = #{joinType},</if>
<if test="joinColumns != null">join_columns = #{joinColumns,typeHandler=com.ruoyi.generator.handler.ListStringTypeHandler},</if>
<if test="joinColumns != null">join_columns = #{joinColumns,typeHandler=com.ruoyi.common.handler.GenericListTypeHandler$StringList},</if>
<if test="orderNum != null">order_num = #{orderNum},</if>
<if test="newTableId != null">new_table_id = #{newTableId},</if>
</trim>