ZhouXY108
/
simple-jdbc
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

优化代码，默认属性名为小驼峰命名，数据库列名为下划线命名。

dev
ZhouXY108 2024-10-03 17:12:32 +08:00
parent 3ad9c9fddb
commit c6582ecf6b
4 changed files with 26 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
pom.xml
View File

@ -21,12 +21,6 @@
<version>0.1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.16.0</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>

6
src/main/java/xyz/zhouxy/jdbc/DbRecord.java
View File

@ -18,9 +18,9 @@ package xyz.zhouxy.jdbc;
import com.google.common.annotations.Beta;
import com.google.common.base.Preconditions;
import org.apache.commons.lang3.StringUtils;
import xyz.zhouxy.plusone.commons.collection.AbstractMapWrapper;
import xyz.zhouxy.plusone.commons.util.OptionalTools;
import xyz.zhouxy.plusone.commons.util.StringTools;
import java.util.*;
@ -28,11 +28,11 @@ import java.util.*;
public class DbRecord extends AbstractMapWrapper<String, Object, DbRecord> {
public DbRecord() {
super(new HashMap<>(), k -> Preconditions.checkArgument(StringUtils.isNotBlank(k), "Key must has text."), null);
super(new HashMap<>(), k -> Preconditions.checkArgument(StringTools.isNotBlank(k), "Key must has text."), null);
}
public DbRecord(Map<String, Object> map) {
super(map, k -> Preconditions.checkArgument(StringUtils.isNotBlank(k), "Key must has text."), null);
super(map, k -> Preconditions.checkArgument(StringTools.isNotBlank(k), "Key must has text."), null);
}
public Optional<String> getValueAsString(String key) {

38
src/main/java/xyz/zhouxy/jdbc/DefaultBeanResultMap.java
View File

@ -33,6 +33,8 @@ import java.util.stream.Collectors;
import javax.annotation.Nullable;
import com.google.common.base.CaseFormat;
public class DefaultBeanResultMap<T> implements ResultMap<T> {
private final Constructor<T> constructor;
@ -50,24 +52,28 @@ public class DefaultBeanResultMap<T> implements ResultMap<T> {
public static <T> DefaultBeanResultMap<T> of(Class<T> beanType, @Nullable Map<String, String> propertyColMap)
throws SQLException {
try {
BeanInfo beanInfo = Introspector.getBeanInfo(beanType);
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
Map<String, PropertyDescriptor> colPropertyMap;
if (propertyColMap != null && !propertyColMap.isEmpty()) {
colPropertyMap = Arrays.stream(propertyDescriptors)
.collect(Collectors.toMap(p -> {
String propertyName = p.getName();
String colName = propertyColMap.get(propertyName);
return colName != null ? colName : propertyName;
}, Function.identity(), (a, b) -> b));
}
else {
colPropertyMap = Arrays.stream(propertyDescriptors)
.collect(Collectors.toMap(PropertyDescriptor::getName, Function.identity(), (a, b) -> b));
}
// 获取无参构造器
Constructor<T> constructor = beanType.getDeclaredConstructor();
constructor.setAccessible(true); // NOSONAR
// 构建 column name 和 PropertyDescriptor 的 映射
BeanInfo beanInfo = Introspector.getBeanInfo(beanType);
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
Function<? super PropertyDescriptor, String> keyMapper;
if (propertyColMap == null || propertyColMap.isEmpty()) {
keyMapper = p -> CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, p.getName());
}
else {
keyMapper = p -> {
String propertyName = p.getName();
String colName = propertyColMap.get(propertyName);
return colName != null ? colName
: CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, propertyName);
};
}
Map<String, PropertyDescriptor> colPropertyMap = Arrays.stream(propertyDescriptors).collect(
Collectors.toMap(keyMapper, Function.identity(), (a, b) -> b));
return new DefaultBeanResultMap<>(constructor, colPropertyMap);
}
catch (IntrospectionException e) {

4
src/test/java/xyz/zhouxy/jdbc/test/SimpleJdbcTemplateTests.java
View File

@ -22,13 +22,11 @@ import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import xyz.zhouxy.jdbc.DbRecord;
import xyz.zhouxy.jdbc.DefaultBeanResultMap;
import xyz.zhouxy.jdbc.ResultMap;
import xyz.zhouxy.jdbc.SimpleJdbcTemplate;
import xyz.zhouxy.jdbc.SimpleJdbcTemplate.JdbcExecutor;
@ -229,7 +227,7 @@ class SimpleJdbcTemplateTests {
Optional<TestBean> t = jdbcTemplate.queryFirst(
"SELECT * FROM test_table WHERE id = ?",
buildParams(22915),
ResultMap.beanResultMap(TestBean.class, ImmutableMap.of("usageDate", "usage_date", "usageDuration", "usage_duration")));
ResultMap.beanResultMap(TestBean.class));
log.info("t: {}", t);
}
}