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对一和对多支持嵌套

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yulichang 2022-11-15 10:11:57 +08:00
parent beffa8880a
commit 4426d1787b
15 changed files with 255 additions and 130 deletions
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4
mybatis-plus-join-boot-starter/src/main/java/com/github/yulichang/autoconfigure/MybatisPlusJoinAutoConfiguration.java
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@ -33,8 +33,10 @@ import javax.sql.DataSource;
import java.util.List;
/**
* springboot 自动配置类
*
* @author yulichang
* @since 1.3.2
* @since 2.0.0
*/
@SuppressWarnings("unused")
@Configuration(proxyBeanMethods = false)

4
mybatis-plus-join-boot-starter/src/main/java/com/github/yulichang/autoconfigure/MybatisPlusJoinProperties.java
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@ -5,8 +5,10 @@ import lombok.experimental.Accessors;
import org.springframework.boot.context.properties.ConfigurationProperties;
/**
* 配置类
*
* @author yulichang
* @since 1.3.2
* @since 2.0.0
*/
@Data
@Accessors(chain = true)

1
mybatis-plus-join-core/pom.xml
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@ -1,4 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
<!--suppress VulnerableLibrariesLocal -->
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

43
mybatis-plus-join-core/src/main/java/com/github/yulichang/interceptor/MPJInterceptor.java
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@ -209,8 +209,15 @@ public class MPJInterceptor implements Interceptor {
//移除result中不存在的标签
resultMappings.removeIf(i -> !fieldMap.containsKey(i.getProperty()));
if (wrapper.isResultMap()) {
List<MybatisLabel<?, ?>> mybatisLabel = wrapper.getResultMapMybatisLabel();
for (MybatisLabel mpjColl : mybatisLabel) {
buildResult(ms, wrapper.getResultMapMybatisLabel(), columnSet, resultMappings, columnList);
}
result.add(new ResultMap.Builder(ms.getConfiguration(), id, resultType, resultMappings).build());
return result;
}
private void buildResult(MappedStatement ms, List<MybatisLabel<?, ?>> mybatisLabel, Set<String> columnSet,
List<ResultMapping> parentMappings, List<SelectColumn> columnList) {
for (MybatisLabel<?, ?> mpjColl : mybatisLabel) {
List<Result> list = mpjColl.getResultList();
if (CollectionUtils.isEmpty(list)) {
continue;
@ -227,13 +234,21 @@ public class MPJInterceptor implements Interceptor {
if (r.isId()) {//主键标记为id标签
builder.flags(Collections.singletonList(ResultFlag.ID));
}
//TypeHandle
TableFieldInfo info = r.getTableFieldInfo();
if (info != null && info.getTypeHandler() != null && info.getTypeHandler() != UnknownTypeHandler.class) {
builder.typeHandler(getTypeHandler(ms, info));
}
childMapping.add(builder.build());
}
String childId = id + StringPool.UNDERSCORE + mpjColl.getEntityClass().getName() + StringPool.UNDERSCORE +
mpjColl.getOfType().getName() + StringPool.UNDERSCORE + mpjColl.getLabelType() + StringPool.UNDERSCORE +
childMapping.stream().map(i -> (CollectionUtils.isEmpty(i.getFlags()) ? ResultFlag.CONSTRUCTOR :
i.getFlags().get(0)) + i.getProperty() + i.getColumn()).collect(Collectors.joining(StringPool.DASH));
resultMappings.add(new ResultMapping.Builder(ms.getConfiguration(), mpjColl.getProperty())
//嵌套处理
if (CollectionUtils.isNotEmpty(mpjColl.getMybatisLabels())) {
this.buildResult(ms, mpjColl.getMybatisLabels(), columnSet, childMapping, columnList);
}
String childId = "MPJ_" + mpjColl.getEntityClass().getName() + StringPool.UNDERSCORE + mpjColl.getOfType().getName() +
StringPool.UNDERSCORE + childMapping.stream().map(i -> (CollectionUtils.isEmpty(i.getFlags()) ?
ResultFlag.CONSTRUCTOR : i.getFlags().get(0)) + i.getProperty() + i.getColumn()).collect(Collectors.joining(StringPool.DASH));
parentMappings.add(new ResultMapping.Builder(ms.getConfiguration(), mpjColl.getProperty())
.javaType(mpjColl.getJavaType())
.nestedResultMapId(childId)
.build());
@ -244,9 +259,6 @@ public class MPJInterceptor implements Interceptor {
}
}
}
result.add(new ResultMap.Builder(ms.getConfiguration(), id, resultType, resultMappings).build());
return result;
}
/**
* 获取字段typeHandle
@ -268,12 +280,13 @@ public class MPJInterceptor implements Interceptor {
* @return 唯一列名
*/
private String getColumn(Set<String> pool, String columnName) {
if (!pool.contains(columnName)) {
pool.add(columnName);
return columnName;
String tagName = StringUtils.getTargetColumn(columnName);
if (!pool.contains(tagName)) {
pool.add(tagName);
return tagName;
}
columnName = "mpj_" + StringUtils.getTargetColumn(columnName);
return getColumn(pool, columnName);
tagName = "mpj_" + tagName;
return getColumn(pool, tagName);
}
/**

16
mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
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@ -11,14 +11,16 @@ import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import com.github.yulichang.exception.MPJException;
import com.github.yulichang.toolkit.*;
import com.github.yulichang.toolkit.Constant;
import com.github.yulichang.toolkit.LambdaUtils;
import com.github.yulichang.toolkit.MPJWrappers;
import com.github.yulichang.toolkit.ReflectionKit;
import com.github.yulichang.toolkit.support.ColumnCache;
import com.github.yulichang.toolkit.support.SelectColumn;
import com.github.yulichang.wrapper.enums.BaseFuncEnum;
import com.github.yulichang.wrapper.interfaces.LambdaJoin;
import com.github.yulichang.wrapper.interfaces.Query;
import com.github.yulichang.wrapper.interfaces.on.OnFunction;
import com.github.yulichang.wrapper.resultmap.LabelType;
import com.github.yulichang.wrapper.resultmap.MFunc;
import com.github.yulichang.wrapper.resultmap.MybatisLabel;
import lombok.Getter;
@ -182,13 +184,13 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
MybatisLabel.Builder<C, Z> builder;
if (genericType == null || genericType.isAssignableFrom(child)) {
//找不到集合泛型 List List<?> List<Object> ， 直接查询数据库实体
builder = new MybatisLabel.Builder<>(LabelType.COLLECTION, dtoFieldName, child, field.getType());
builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType());
} else {
Class<Z> ofType = (Class<Z>) genericType;
if (ReflectionKit.isPrimitiveOrWrapper(ofType)) {
throw new MPJException("collection 不支持基本数据类型");
}
builder = new MybatisLabel.Builder<>(LabelType.COLLECTION, dtoFieldName, child, field.getType(), ofType, true);
builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType(), ofType, true);
}
this.resultMapMybatisLabel.add(builder.build());
return typedThis;
@ -231,7 +233,7 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
//获取集合泛型
Class<?> genericType = ReflectionKit.getGenericType(field);
Class<Z> ofType = (Class<Z>) genericType;
MybatisLabel.Builder<C, Z> builder = new MybatisLabel.Builder<>(LabelType.COLLECTION, dtoFieldName, child, field.getType(), ofType, false);
MybatisLabel.Builder<C, Z> builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType(), ofType, false);
this.resultMapMybatisLabel.add(collection.apply(builder).build());
return typedThis;
}
@ -252,7 +254,7 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
}
this.resultMap = true;
MybatisLabel.Builder<C, F> builder;
builder = new MybatisLabel.Builder<>(LabelType.ASSOCIATION, dtoFieldName, child, field.getType(), (Class<F>) field.getType(), true);
builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType(), (Class<F>) field.getType(), true);
this.resultMapMybatisLabel.add(builder.build());
return typedThis;
}
@ -272,7 +274,7 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
if (ReflectionKit.isPrimitiveOrWrapper(field.getType())) {
throw new MPJException("association 不支持基本数据类型");
}
MybatisLabel.Builder<C, F> builder = new MybatisLabel.Builder<>(LabelType.ASSOCIATION, dtoFieldName, child, field.getType(), (Class<F>) child, false);
MybatisLabel.Builder<C, F> builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType(), (Class<F>) child, false);
this.resultMapMybatisLabel.add(collection.apply(builder).build());
return typedThis;
}

5
mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/LabelType.java
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@ -1,5 +0,0 @@
package com.github.yulichang.wrapper.resultmap;
public enum LabelType {
COLLECTION, ASSOCIATION
}

102
mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabel.java
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@ -3,12 +3,17 @@ package com.github.yulichang.wrapper.resultmap;
import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
import com.baomidou.mybatisplus.core.metadata.TableInfo;
import com.baomidou.mybatisplus.core.metadata.TableInfoHelper;
import com.baomidou.mybatisplus.core.toolkit.Assert;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import com.github.yulichang.exception.MPJException;
import com.github.yulichang.toolkit.LambdaUtils;
import com.github.yulichang.toolkit.ReflectionKit;
import lombok.Getter;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
@ -23,8 +28,6 @@ import java.util.stream.Collectors;
@Getter
public class MybatisLabel<E, T> {
private LabelType labelType;
private String property;
private Class<E> entityClass;
@ -35,13 +38,15 @@ public class MybatisLabel<E, T> {
private List<Result> resultList;
//collection嵌套
// private List<Collection> collectionList;
/**
* wrapper里面的引用
*/
private List<MybatisLabel<?, ?>> mybatisLabels;
private MybatisLabel() {
}
@SuppressWarnings("unused")
@SuppressWarnings({"unused", "unchecked"})
public static class Builder<E, T> {
private final MybatisLabel<E, T> mybatisLabel;
@ -50,14 +55,14 @@ public class MybatisLabel<E, T> {
* 自动构建
*/
@SuppressWarnings("unchecked")
public Builder(LabelType labelType, String property, Class<E> entityClass, Class<?> javaType) {
public Builder(String property, Class<E> entityClass, Class<?> javaType) {
this.mybatisLabel = new MybatisLabel<>();
mybatisLabel.labelType = labelType;
mybatisLabel.property = property;
mybatisLabel.entityClass = entityClass;
mybatisLabel.javaType = javaType;
mybatisLabel.ofType = (Class<T>) entityClass;
mybatisLabel.resultList = new ArrayList<>();
mybatisLabel.mybatisLabels = new ArrayList<>();
autoBuild(true, entityClass, (Class<T>) entityClass);
}
@ -70,14 +75,14 @@ public class MybatisLabel<E, T> {
* @param ofType 映射类
* @param auto 自动映射数据库实体对应的字段
*/
public Builder(LabelType labelType, String property, Class<E> entityClass, Class<?> javaType, Class<T> ofType, boolean auto) {
public Builder(String property, Class<E> entityClass, Class<?> javaType, Class<T> ofType, boolean auto) {
this.mybatisLabel = new MybatisLabel<>();
mybatisLabel.labelType = labelType;
mybatisLabel.property = property;
mybatisLabel.entityClass = entityClass;
mybatisLabel.javaType = javaType;
mybatisLabel.ofType = ofType;
mybatisLabel.resultList = new ArrayList<>();
mybatisLabel.mybatisLabels = new ArrayList<>();
autoBuild(auto, entityClass, ofType);
}
@ -109,7 +114,85 @@ public class MybatisLabel<E, T> {
return this;
}
/**
* 嵌套
*/
public <A, R, B extends Collection<R>> Builder<E, T> collection(Class<A> entityClass, SFunction<T, B> func) {
String dtoFieldName = LambdaUtils.getName(func);
Class<T> dtoClass = LambdaUtils.getEntityClass(func);
Map<String, Field> fieldMap = ReflectionKit.getFieldMap(dtoClass);
Field field = fieldMap.get(dtoFieldName);
Class<?> genericType = ReflectionKit.getGenericType(field);
MybatisLabel.Builder<A, R> builder;
if (genericType == null || genericType.isAssignableFrom(entityClass)) {
//找不到集合泛型 List List<?> List<Object> ， 直接查询数据库实体
builder = new Builder<>(dtoFieldName, entityClass, field.getType());
} else {
Class<R> ofType = (Class<R>) genericType;
if (ReflectionKit.isPrimitiveOrWrapper(ofType)) {
throw new MPJException("collection 不支持基本数据类型");
}
builder = new Builder<>(dtoFieldName, entityClass, field.getType(), ofType, true);
}
mybatisLabel.mybatisLabels.add(builder.build());
return this;
}
/**
* 嵌套
*/
public <A, R, B extends Collection<R>> Builder<E, T> collection(Class<A> entityClass, SFunction<T, B> func, MFunc<Builder<A, R>> mFunc) {
String dtoFieldName = LambdaUtils.getName(func);
Class<T> dtoClass = LambdaUtils.getEntityClass(func);
Field field = ReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
//获取集合泛型
Class<?> genericType = ReflectionKit.getGenericType(field);
Class<R> ofType = (Class<R>) genericType;
MybatisLabel.Builder<A, R> builder = new MybatisLabel.Builder<>(dtoFieldName, entityClass, field.getType(), ofType, false);
mybatisLabel.mybatisLabels.add(mFunc.apply(builder).build());
return this;
}
/**
* 嵌套
*/
public <A, B> Builder<E, T> association(Class<A> child, SFunction<T, B> dtoField) {
Class<T> dtoClass = LambdaUtils.getEntityClass(dtoField);
Map<String, Field> fieldMap = ReflectionKit.getFieldMap(dtoClass);
String dtoFieldName = LambdaUtils.getName(dtoField);
Field field = fieldMap.get(dtoFieldName);
Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
if (ReflectionKit.isPrimitiveOrWrapper(field.getType())) {
throw new MPJException("association 不支持基本数据类型");
}
MybatisLabel.Builder<A, B> builder;
builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType(), (Class<B>) field.getType(), true);
mybatisLabel.mybatisLabels.add(builder.build());
return this;
}
/**
* 嵌套
*/
public <A, B> Builder<E, T> selectAssociation(Class<A> child, SFunction<T, B> dtoField,
MFunc<MybatisLabel.Builder<A, B>> collection) {
String dtoFieldName = LambdaUtils.getName(dtoField);
Class<T> dtoClass = LambdaUtils.getEntityClass(dtoField);
Field field = ReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
if (ReflectionKit.isPrimitiveOrWrapper(field.getType())) {
throw new MPJException("association 不支持基本数据类型");
}
MybatisLabel.Builder<A, B> builder = new MybatisLabel.Builder<>(dtoFieldName, child, field.getType(), (Class<B>) child, false);
mybatisLabel.mybatisLabels.add(collection.apply(builder).build());
return this;
}
public MybatisLabel<E, T> build() {
if (CollectionUtils.isEmpty(mybatisLabel.resultList)) {
autoBuild(true, mybatisLabel.entityClass, mybatisLabel.ofType);
}
return mybatisLabel;
}
@ -120,6 +203,7 @@ public class MybatisLabel<E, T> {
Function<TableFieldInfo, Result> build = field -> {
Result result = new Result();
result.setId(false);
result.setTableFieldInfo(field);
result.setColumn(field.getColumn());
result.setProperty(field.getProperty());
result.setJavaType(field.getField().getType());

5
mybatis-plus-join-test/pom.xml
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@ -83,6 +83,11 @@
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.4.5</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.14.0</version>
</dependency>
</dependencies>
</project>

26
mybatis-plus-join-test/src/main/java/com/github/yulichang/test/dto/AddressDTO.java Normal file
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@ -0,0 +1,26 @@
package com.github.yulichang.test.dto;
import com.github.yulichang.test.entity.AreaDO;
import lombok.Data;
import java.util.List;
@Data
public class AddressDTO {
private Integer id;
private Integer userId;
private Integer areaId;
private String tel;
private String address;
private Boolean del;
private List<AreaDO> areaList;
private AreaDO area;
}

27
mybatis-plus-join-test/src/main/java/com/github/yulichang/test/dto/AreaDTO.java Normal file
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@ -0,0 +1,27 @@
package com.github.yulichang.test.dto;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import lombok.experimental.Accessors;
@Data
@ToString
@Accessors(chain = true)
@EqualsAndHashCode
@TableName("area")
public class AreaDTO {
private Integer id;
private String province;
private String city;
private String area;
private String postcode;
private Boolean del;
}

6
mybatis-plus-join-test/src/main/java/com/github/yulichang/test/dto/UserDTO.java
View File

@ -1,11 +1,11 @@
package com.github.yulichang.test.dto;
import com.github.yulichang.test.entity.AddressDO;
import com.github.yulichang.test.enums.Sex;
import lombok.Data;
import lombok.ToString;
import java.util.List;
import java.util.Map;
/**
@ -17,7 +17,7 @@ public class UserDTO {
/** user */
private Integer id;
/** user */
private String nameName;
private Map<String,String> name;
/** user */
private Sex sex;
/** user */
@ -37,5 +37,5 @@ public class UserDTO {
/** area */
private String area;
private List<AddressDO> addressList;
private List<AddressDTO> addressList;
}

9
mybatis-plus-join-test/src/main/java/com/github/yulichang/test/entity/UserDO.java
View File

@ -4,24 +4,27 @@ import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableLogic;
import com.baomidou.mybatisplus.annotation.TableName;
import com.baomidou.mybatisplus.extension.handlers.JacksonTypeHandler;
import com.github.yulichang.test.enums.Sex;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import lombok.experimental.Accessors;
import java.util.Map;
@Data
@ToString
@Accessors(chain = true)
@EqualsAndHashCode
@TableName("`user`")
@TableName(value = "`user`",autoResultMap = true)
public class UserDO {
@TableId
private Integer id;
@TableField("name")
private String sdafrrvnbioiure;
@TableField(value = "`name`", typeHandler = JacksonTypeHandler.class)
private Map<String,String> name;
private Sex sex;

44
mybatis-plus-join-test/src/main/resources/db/data.sql
View File

@ -29,28 +29,28 @@ INSERT INTO area (id, province, city, area, postcode, del) VALUES (10022, '北
DELETE FROM `user`;
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 1, '张三01', 1, 1, 'https://url-01', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 2, '李四02', 1, 0, 'https://url-02', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 3, '李四02', 1, 0, 'https://url-03', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 4, '李四04', 1, 0, 'https://url-04', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 5, '李四05', 1, 0, 'https://url-05', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 6, '李四06', 1, 0, 'https://url-06', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 7, '李四07', 1, 0, 'https://url-07', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 8, '李四08', 1, 0, 'https://url-08', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 9, '李四09', 1, 0, 'https://url-09', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (10, '李四10', 1, 0, 'https://url-10', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (11, '李四11', 1, 0, 'https://url-11', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (12, '李四12', 1, 0, 'https://url-12', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (13, '李四13', 1, 0, 'https://url-13', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (14, '李四14', 1, 0, 'https://url-14', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (15, '李四15', 1, 0, 'https://url-15', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (16, '李四16', 1, 0, 'https://url-16', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (17, '李四17', 1, 0, 'https://url-17', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (18, '李四18', 1, 0, 'https://url-18', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (19, '李四19', 1, 0, 'https://url-19', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (20, '李四20', 1, 0, 'https://url-20', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (21, '李四21', 1, 0, 'https://url-21', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (22, '李四22', 1, 0, 'https://url-22', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 1, '{"aa":"aaa","bb":"bbb"}', 1, 1, 'https://url-01', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 2, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-02', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 3, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-03', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 4, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-04', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 5, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-05', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 6, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-06', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 7, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-07', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 8, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-08', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES ( 9, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-09', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (10, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-10', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (11, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-11', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (12, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-12', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (13, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-13', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (14, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-14', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (15, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-15', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (16, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-16', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (17, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-17', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (18, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-18', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (19, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-19', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (20, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-20', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (21, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-21', false);
INSERT INTO `user` (id, `name`, `address_id`, sex, head_img, del) VALUES (22, '{"aa":"aaa","bb":"bbb"}', 1, 0, 'https://url-22', false);
DELETE FROM address;

8
mybatis-plus-join-test/src/test/java/com/github/yulichang/test/JoinTest.java → mybatis-plus-join-test/src/test/java/com/github/yulichang/test/LambdaWrapperTest.java
View File

@ -2,6 +2,7 @@ package com.github.yulichang.test;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.github.yulichang.test.dto.AddressDTO;
import com.github.yulichang.test.dto.UserDTO;
import com.github.yulichang.test.entity.AddressDO;
import com.github.yulichang.test.entity.AreaDO;
@ -27,7 +28,7 @@ import java.util.Map;
*/
@SpringBootTest
@SuppressWarnings("unused")
class JoinTest {
class LambdaWrapperTest {
@Resource
private UserMapper userMapper;
@Resource
@ -40,10 +41,11 @@ class JoinTest {
void testJoin() {
MPJLambdaWrapper<UserDO> wrapper = new MPJLambdaWrapper<UserDO>()
.selectAll(UserDO.class)
.selectCollection(AddressDO.class, UserDTO::getAddressList)
.selectCollection(AddressDO.class, UserDTO::getAddressList, addr -> addr
.association(AreaDO.class, AddressDTO::getArea))
.leftJoin(AddressDO.class, AddressDO::getUserId, UserDO::getId)
.leftJoin(AreaDO.class, AreaDO::getId, AddressDO::getAreaId)
.orderByDesc(UserDO::getId);
List<UserDTO> list = userMapper.selectJoinList(UserDTO.class, wrapper);
list.forEach(System.out::println);
}

37
mybatis-plus-join-test/src/test/java/com/github/yulichang/test/MPJ131Test.java
View File

@ -1,37 +0,0 @@
package com.github.yulichang.test;
import com.github.yulichang.test.mapper.UserMapper;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import javax.annotation.Resource;
/**
* 测试
*/
@SpringBootTest
@SuppressWarnings("unused")
class MPJ131Test {
@Resource
private UserMapper userMapper;
/**
* 先明确 你要干啥？
* 在mapper中定义lambda形式的resultMap？
* 要解决问题
* 1、只初始化了部分数据库实体类？ NPE
* <p>
* stater
* core
* anntion
* test
* <p>
* 超高自由度的sql拼接器？
* 解决了自连接和子查询和各种函数
* 如果底层调用MPJLambdaWrapper那样还有什么意义
*/
@Test
void testJoin() {
System.out.println(1);
}
}