Mybatis-Plus 官方神器發(fā)布！

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0、簡介

mybatis-mate 為 mp 企業(yè)級模塊，支持分庫分表，數(shù)據(jù)審計、數(shù)據(jù)敏感詞過濾（AC算法），字段加密，字典回寫（數(shù)據(jù)綁定），數(shù)據(jù)權(quán)限，表結(jié)構(gòu)自動生成 SQL 維護(hù)等，旨在更敏捷優(yōu)雅處理數(shù)據(jù)。

1、主要功能

• 字典綁定

• 字段加密

• 數(shù)據(jù)脫敏

• 表結(jié)構(gòu)動態(tài)維護(hù)

• 數(shù)據(jù)審計記錄

• 數(shù)據(jù)范圍（數(shù)據(jù)權(quán)限）

• 數(shù)據(jù)庫分庫分表、動態(tài)據(jù)源、讀寫分離、數(shù)據(jù)庫健康檢查自動切換。

2、使用

2.1 依賴導(dǎo)入

Spring Boot 引入自動依賴注解包

??com.baomidou
??mybatis-mate-starter
??1.0.8

注解（實體分包使用）

??com.baomidou
??mybatis-mate-annotation
??1.0.8

2.2 字段數(shù)據(jù)綁定（字典回寫）

例如?user_sex?類型 sex 字典結(jié)果映射到 sexText 屬性

@FieldDict(type?=?"user_sex",?target?=?"sexText")
private?Integer?sex;
?
private?String?sexText;

實現(xiàn) IDataDict 接口提供字典數(shù)據(jù)源，注入到 Spring 容器即可。

@Component
public?class?DataDict?implements?IDataDict?{
?
????/**
?????*?從數(shù)據(jù)庫或緩存中獲取
?????*/
????private?Map?SEX_MAP?=?new?ConcurrentHashMap()?{{
????????put("0",?"女");
????????put("1",?"男");
????}};
?
????@Override
????public?String?getNameByCode(FieldDict?fieldDict,?String?code)?{
????????System.err.println("字段類型："?+?fieldDict.type()?+?"，編碼："?+?code);
????????return?SEX_MAP.get(code);
????}
}

2.3 字段加密

屬性?@FieldEncrypt?注解即可加密存儲，會自動解密查詢結(jié)果，支持全局配置加密密鑰算法，及注解密鑰算法，可以實現(xiàn) IEncryptor 注入自定義算法。

@FieldEncrypt(algorithm?=?Algorithm.PBEWithMD5AndDES)
private?String?password;

2.4 字段脫敏

屬性?@FieldSensitive?注解即可自動按照預(yù)設(shè)策略對源數(shù)據(jù)進(jìn)行脫敏處理，默認(rèn) SensitiveType 內(nèi)置 9 種常用脫敏策略。

例如：中文名、銀行卡賬號、手機號碼等 脫敏策略。

也可以自定義策略如下：

@FieldSensitive(type?=?"testStrategy")
private?String?username;
?
@FieldSensitive(type?=?SensitiveType.mobile)
private?String?mobile;

自定義脫敏策略 testStrategy 添加到默認(rèn)策略中注入 Spring 容器即可。

@Configuration
public?class?SensitiveStrategyConfig?{
?
????/**
?????*?注入脫敏策略
?????*/
????@Bean
????public?ISensitiveStrategy?sensitiveStrategy()?{
????????//?自定義?testStrategy?類型脫敏處理
????????return?new?SensitiveStrategy().addStrategy("testStrategy",?t?->?t?+?"***test***");
????}
}

例如文章敏感詞過濾

/**
?*?演示文章敏感詞過濾
?*/
@RestController
public?class?ArticleController?{
????@Autowired
????private?SensitiveWordsMapper?sensitiveWordsMapper;
?
????//?測試訪問下面地址觀察請求地址、界面返回數(shù)據(jù)及控制臺（?普通參數(shù)?）
????//?無敏感詞?http://localhost:8080/info?content=tom&see=1&age=18
????//?英文敏感詞?http://localhost:8080/info?content=my%20content%20is%20tomcat&see=1&age=18
????//?漢字敏感詞?http://localhost:8080/info?content=%E7%8E%8B%E5%AE%89%E7%9F%B3%E5%94%90%E5%AE%8B%E5%85%AB%E5%A4%A7%E5%AE%B6&see=1
????//?多個敏感詞?http://localhost:8080/info?content=%E7%8E%8B%E5%AE%89%E7%9F%B3%E6%9C%89%E4%B8%80%E5%8F%AA%E7%8C%ABtomcat%E6%B1%A4%E5%A7%86%E5%87%AF%E7%89%B9&see=1&size=6
????//?插入一個字變成非敏感詞?http://localhost:8080/info?content=%E7%8E%8B%E7%8C%AB%E5%AE%89%E7%9F%B3%E6%9C%89%E4%B8%80%E5%8F%AA%E7%8C%ABtomcat%E6%B1%A4%E5%A7%86%E5%87%AF%E7%89%B9&see=1&size=6
????@GetMapping("/info")
????public?String?info(Article?article)?throws?Exception?{
????????return?ParamsConfig.toJson(article);
????}
?
?
????//?添加一個敏感詞然后再去觀察是否生效?http://localhost:8080/add
????//?觀察【貓】這個詞被過濾了?http://localhost:8080/info?content=%E7%8E%8B%E5%AE%89%E7%9F%B3%E6%9C%89%E4%B8%80%E5%8F%AA%E7%8C%ABtomcat%E6%B1%A4%E5%A7%86%E5%87%AF%E7%89%B9&see=1&size=6
????//?嵌套敏感詞處理?http://localhost:8080/info?content=%E7%8E%8B%E7%8C%AB%E5%AE%89%E7%9F%B3%E6%9C%89%E4%B8%80%E5%8F%AA%E7%8C%ABtomcat%E6%B1%A4%E5%A7%86%E5%87%AF%E7%89%B9&see=1&size=6
????//?多層嵌套敏感詞?http://localhost:8080/info?content=%E7%8E%8B%E7%8E%8B%E7%8C%AB%E5%AE%89%E7%9F%B3%E5%AE%89%E7%9F%B3%E6%9C%89%E4%B8%80%E5%8F%AA%E7%8C%ABtomcat%E6%B1%A4%E5%A7%86%E5%87%AF%E7%89%B9&see=1&size=6
????@GetMapping("/add")
????public?String?add()?throws?Exception?{
????????Long?id?=?3L;
????????if?(null?==?sensitiveWordsMapper.selectById(id))?{
????????????System.err.println("插入一個敏感詞："?+?sensitiveWordsMapper.insert(new?SensitiveWords(id,?"貓")));
????????????//?插入一個敏感詞，刷新算法引擎敏感詞
????????????SensitiveWordsProcessor.reloadSensitiveWords();
????????}
????????return?"ok";
????}
?
????//?測試訪問下面地址觀察控制臺（?請求json參數(shù)?）
????//?idea?執(zhí)行?resources?目錄?TestJson.http?文件測試
????@PostMapping("/json")
????public?String?json(@RequestBody?Article?article)?throws?Exception?{
????????return?ParamsConfig.toJson(article);
????}
}

2.5 DDL 數(shù)據(jù)結(jié)構(gòu)自動維護(hù)

解決升級表結(jié)構(gòu)初始化，版本發(fā)布更新 SQL 維護(hù)問題，目前支持 MySql、PostgreSQL。

@Component
public?class?PostgresDdl?implements?IDdl?{
?
????/**
?????*?執(zhí)行?SQL?腳本方式
?????*/
????@Override
????public?List?getSqlFiles()?{
????????return?Arrays.asList(
????????????????//?內(nèi)置包方式
????????????????"db/tag-schema.sql",
????????????????//?文件絕對路徑方式
????????????????"D:\\db\\tag-data.sql"
????????);
????}
}

不僅僅可以固定執(zhí)行，也可以動態(tài)執(zhí)行??！

?
ddlScript.run(new?StringReader("DELETE?FROM?user;\n"?+
????????????????"INSERT?INTO?user?(id,?username,?password,?sex,?email)?VALUES\n"?+
????????????????"(20,?'Duo',?'123456',?0,?'[email protected]');"));

它還支持多數(shù)據(jù)源執(zhí)行?。?！

@Component
public?class?MysqlDdl?implements?IDdl?{
?
????@Override
????public?void?sharding(Consumer?consumer)?{
????????//?多數(shù)據(jù)源指定，主庫初始化從庫自動同步
????????String?group?=?"mysql";
????????ShardingGroupProperty?sgp?=?ShardingKey.getDbGroupProperty(group);
????????if?(null?!=?sgp)?{
????????????//?主庫
????????????sgp.getMasterKeys().forEach(key?->?{
????????????????ShardingKey.change(group?+?key);
????????????????consumer.accept(this);
????????????});
????????????//?從庫
????????????sgp.getSlaveKeys().forEach(key?->?{
????????????????ShardingKey.change(group?+?key);
????????????????consumer.accept(this);
????????????});
????????}
????}
?
????/**
?????*?執(zhí)行?SQL?腳本方式
?????*/
????@Override
????public?List?getSqlFiles()?{
????????return?Arrays.asList("db/user-mysql.sql");
????}
}

2.6 動態(tài)多數(shù)據(jù)源主從自由切換

@Sharding?注解使數(shù)據(jù)源不限制隨意使用切換，你可以在 mapper 層添加注解，按需求指哪打哪！！

@Mapper
@Sharding("mysql")
public?interface?UserMapper?extends?BaseMapper?{
?
????@Sharding("postgres")
????Long?selectByUsername(String?username);
}

你也可以自定義策略統(tǒng)一調(diào)兵遣將

@Component
public?class?MyShardingStrategy?extends?RandomShardingStrategy?{
?
????/**
?????*?決定切換數(shù)據(jù)源?key?{@link?ShardingDatasource}
?????*
?????*?@param?group??????????動態(tài)數(shù)據(jù)庫組
?????*?@param?invocation?????{@link?Invocation}
?????*?@param?sqlCommandType?{@link?SqlCommandType}
?????*/
????@Override
????public?void?determineDatasourceKey(String?group,?Invocation?invocation,?SqlCommandType?sqlCommandType)?{
????????//?數(shù)據(jù)源組?group?自定義選擇即可，?keys?為數(shù)據(jù)源組內(nèi)主從多節(jié)點，可隨機選擇或者自己控制
????????this.changeDatabaseKey(group,?sqlCommandType,?keys?->?chooseKey(keys,?invocation));
????}
}

可以開啟主從策略，當(dāng)然也是可以開啟健康檢查?。。?/span>

具體配置：

mybatis-mate:
??sharding:
????health:?true?#?健康檢測
????primary:?mysql?#?默認(rèn)選擇數(shù)據(jù)源
????datasource:
??????mysql:?#?數(shù)據(jù)庫組
????????-?key:?node1
??????????...
????????-?key:?node2
??????????cluster:?slave?#?從庫讀寫分離時候負(fù)責(zé)?sql?查詢操作，主庫?master?默認(rèn)可以不寫
??????????...
??????postgres:
????????-?key:?node1?#?數(shù)據(jù)節(jié)點
??????????...

2.7 分布式事務(wù)日志打印

部分配置如下：

/**
?*?

?*?性能分析攔截器，用于輸出每條?SQL?語句及其執(zhí)行時間
?*?

?*/
@Slf4j
@Component
@Intercepts({@Signature(type?=?StatementHandler.class,?method?=?"query",?args?=?{Statement.class,?ResultHandler.class}),
????????@Signature(type?=?StatementHandler.class,?method?=?"update",?args?=?{Statement.class}),
????????@Signature(type?=?StatementHandler.class,?method?=?"batch",?args?=?{Statement.class})})
public?class?PerformanceInterceptor?implements?Interceptor?{
????/**
?????* SQL 執(zhí)行最大時長，超過自動停止運行，有助于發(fā)現(xiàn)問題。
?????*/
????private?long?maxTime?=?0;
????/**
?????*?SQL?是否格式化
?????*/
????private?boolean?format?=?false;
????/**
?????*?是否寫入日志文件

?????*?true?寫入日志文件，不阻斷程序執(zhí)行！

?????*?超過設(shè)定的最大執(zhí)行時長異常提示！
?????*/
????private?boolean?writeInLog?=?false;
?
????@Override
????public?Object?intercept(Invocation?invocation)?throws?Throwable?{
????????Statement?statement;
????????Object?firstArg?=?invocation.getArgs()[0];
????????if?(Proxy.isProxyClass(firstArg.getClass()))?{
????????????statement?=?(Statement)?SystemMetaObject.forObject(firstArg).getValue("h.statement");
????????}?else?{
????????????statement?=?(Statement)?firstArg;
????????}
????????MetaObject?stmtMetaObj?=?SystemMetaObject.forObject(statement);
????????try?{
????????????statement?=?(Statement)?stmtMetaObj.getValue("stmt.statement");
????????}?catch?(Exception?e)?{
????????????//?do?nothing
????????}
????????if?(stmtMetaObj.hasGetter("delegate"))?{//Hikari
????????????try?{
????????????????statement?=?(Statement)?stmtMetaObj.getValue("delegate");
????????????}?catch?(Exception?e)?{
?
????????????}
????????}
?
????????String?originalSql?=?null;
????????if?(originalSql?==?null)?{
????????????originalSql?=?statement.toString();
????????}
????????originalSql?=?originalSql.replaceAll("[\\s]+",?"?");
????????int?index?=?indexOfSqlStart(originalSql);
????????if?(index?>?0)?{
????????????originalSql?=?originalSql.substring(index);
????????}
?
????????//?計算執(zhí)行?SQL?耗時
????????long?start?=?SystemClock.now();
????????Object?result?=?invocation.proceed();
????????long?timing?=?SystemClock.now()?-?start;
?
????????//?格式化?SQL?打印執(zhí)行結(jié)果
????????Object?target?=?PluginUtils.realTarget(invocation.getTarget());
????????MetaObject?metaObject?=?SystemMetaObject.forObject(target);
????????MappedStatement?ms?=?(MappedStatement)?metaObject.getValue("delegate.mappedStatement");
????????StringBuilder?formatSql?=?new?StringBuilder();
????????formatSql.append(" Time：").append(timing);
????????formatSql.append(" ms - ID：").append(ms.getId());
????????formatSql.append("\n Execute SQL：").append(sqlFormat(originalSql,?format)).append("\n");
????????if?(this.isWriteInLog())?{
????????????if?(this.getMaxTime()?>=?1?&&?timing?>?this.getMaxTime())?{
????????????????log.error(formatSql.toString());
????????????}?else?{
????????????????log.debug(formatSql.toString());
????????????}
????????}?else?{
????????????System.err.println(formatSql);
????????????if?(this.getMaxTime()?>=?1?&&?timing?>?this.getMaxTime())?{
????????????????throw?new?RuntimeException("?The?SQL?execution?time?is?too?large,?please?optimize?!?");
????????????}
????????}
????????return?result;
????}
?
????@Override
????public?Object?plugin(Object?target)?{
????????if?(target?instanceof?StatementHandler)?{
????????????return?Plugin.wrap(target,?this);
????????}
????????return?target;
????}
?
????@Override
????public?void?setProperties(Properties?prop)?{
????????String?maxTime?=?prop.getProperty("maxTime");
????????String?format?=?prop.getProperty("format");
????????if?(StringUtils.isNotEmpty(maxTime))?{
????????????this.maxTime?=?Long.parseLong(maxTime);
????????}
????????if?(StringUtils.isNotEmpty(format))?{
????????????this.format?=?Boolean.valueOf(format);
????????}
????}
?
????public?long?getMaxTime()?{
????????return?maxTime;
????}
?
????public?PerformanceInterceptor?setMaxTime(long?maxTime)?{
????????this.maxTime?=?maxTime;
????????return?this;
????}
?
????public?boolean?isFormat()?{
????????return?format;
????}
?
????public?PerformanceInterceptor?setFormat(boolean?format)?{
????????this.format?=?format;
????????return?this;
????}
?
????public?boolean?isWriteInLog()?{
????????return?writeInLog;
????}
?
????public?PerformanceInterceptor?setWriteInLog(boolean?writeInLog)?{
????????this.writeInLog?=?writeInLog;
????????return?this;
????}
?
????public?Method?getMethodRegular(Class?clazz,?String?methodName)?{
????????if?(Object.class.equals(clazz))?{
????????????return?null;
????????}
????????for?(Method?method?:?clazz.getDeclaredMethods())?{
????????????if?(method.getName().equals(methodName))?{
????????????????return?method;
????????????}
????????}
????????return?getMethodRegular(clazz.getSuperclass(),?methodName);
????}
?
????/**
?????*?獲取sql語句開頭部分
?????*
?????*?@param?sql
?????*?@return
?????*/
????private?int?indexOfSqlStart(String?sql)?{
????????String?upperCaseSql?=?sql.toUpperCase();
????????Set?set?=?new?HashSet<>();
????????set.add(upperCaseSql.indexOf("SELECT?"));
????????set.add(upperCaseSql.indexOf("UPDATE?"));
????????set.add(upperCaseSql.indexOf("INSERT?"));
????????set.add(upperCaseSql.indexOf("DELETE?"));
????????set.remove(-1);
????????if?(CollectionUtils.isEmpty(set))?{
????????????return?-1;
????????}
????????List?list?=?new?ArrayList<>(set);
????????Collections.sort(list,?Integer::compareTo);
????????return?list.get(0);
????}
?
????private?final?static?SqlFormatter?sqlFormatter?=?new?SqlFormatter();
?
????/**
?????*?格式sql
?????*
?????*?@param?boundSql
?????*?@param?format
?????*?@return
?????*/
????public?static?String?sqlFormat(String?boundSql,?boolean?format)?{
????????if?(format)?{
????????????try?{
????????????????return?sqlFormatter.format(boundSql);
????????????}?catch?(Exception?ignored)?{
????????????}
????????}
????????return?boundSql;
????}
}

使用：

@RestController
@AllArgsConstructor
public?class?TestController?{
????private?BuyService?buyService;
?
????//?數(shù)據(jù)庫?test?表?t_order?在事務(wù)一致情況無法插入數(shù)據(jù)，能夠插入說明多數(shù)據(jù)源事務(wù)無效
????//?測試訪問?http://localhost:8080/test
????//?制造事務(wù)回滾?http://localhost:8080/test?error=true?也可通過修改表結(jié)構(gòu)制造錯誤
????//?注釋?ShardingConfig?注入?dataSourceProvider?可測試事務(wù)無效情況
????@GetMapping("/test")
????public?String?test(Boolean?error)?{
????????return?buyService.buy(null?!=?error?&&?error);
????}
}

2.8 數(shù)據(jù)權(quán)限

mapper 層添加注解:

//?測試?test?類型數(shù)據(jù)權(quán)限范圍，混合分頁模式
@DataScope(type?=?"test",?value?=?{
????????//?關(guān)聯(lián)表?user?別名?u?指定部門字段權(quán)限
????????@DataColumn(alias?=?"u",?name?=?"department_id"),
????????//?關(guān)聯(lián)表?user?別名?u?指定手機號字段（自己判斷處理）
????????@DataColumn(alias?=?"u",?name?=?"mobile")
})
@Select("select?u.*?from?user?u")
List?selectTestList(IPage?page,?Long?id,?@Param("name")?String?username);

模擬業(yè)務(wù)處理邏輯：

@Bean
public?IDataScopeProvider?dataScopeProvider()?{
????return?new?AbstractDataScopeProvider()?{
????????@Override
????????protected?void?setWhere(PlainSelect?plainSelect,?Object[]?args,?DataScopeProperty?dataScopeProperty)?{
????????????//?args?中包含?mapper?方法的請求參數(shù)，需要使用可以自行獲取
????????????/*
????????????????//?測試數(shù)據(jù)權(quán)限，最終執(zhí)行?SQL?語句
????????????????SELECT?u.*?FROM?user?u?WHERE?(u.department_id?IN?('1',?'2',?'3',?'5'))
????????????????AND?u.mobile?LIKE?'%1533%'
?????????????*/
????????????if?("test".equals(dataScopeProperty.getType()))?{
????????????????//?業(yè)務(wù)?test?類型
????????????????List?dataColumns?=?dataScopeProperty.getColumns();
????????????????for?(DataColumnProperty?dataColumn?:?dataColumns)?{
????????????????????if?("department_id".equals(dataColumn.getName()))?{
????????????????????????//?追加部門字段?IN?條件，也可以是?SQL?語句
????????????????????????Set?deptIds?=?new?HashSet<>();
????????????????????????deptIds.add("1");
????????????????????????deptIds.add("2");
????????????????????????deptIds.add("3");
????????????????????????deptIds.add("5");
????????????????????????ItemsList?itemsList?=?new?ExpressionList(deptIds.stream().map(StringValue::new).collect(Collectors.toList()));
????????????????????????InExpression?inExpression?=?new?InExpression(new?Column(dataColumn.getAliasDotName()),?itemsList);
????????????????????????if?(null?==?plainSelect.getWhere())?{
????????????????????????????//?不存在?where?條件
????????????????????????????plainSelect.setWhere(new?Parenthesis(inExpression));
????????????????????????}?else?{
????????????????????????????//?存在?where?條件?and?處理
????????????????????????????plainSelect.setWhere(new?AndExpression(plainSelect.getWhere(),?inExpression));
????????????????????????}
????????????????????}?else?if?("mobile".equals(dataColumn.getName()))?{
????????????????????????//?支持一個自定義條件
????????????????????????LikeExpression?likeExpression?=?new?LikeExpression();
????????????????????????likeExpression.setLeftExpression(new?Column(dataColumn.getAliasDotName()));
????????????????????????likeExpression.setRightExpression(new?StringValue("%1533%"));
????????????????????????plainSelect.setWhere(new?AndExpression(plainSelect.getWhere(),?likeExpression));
????????????????????}
????????????????}
????????????}
????????}
????};
}

最終執(zhí)行 SQL 輸出：

SELECT?u.*?FROM?user?u?
??WHERE?(u.department_id?IN?('1',?'2',?'3',?'5'))?
??AND?u.mobile?LIKE?'%1533%'?LIMIT?1,?10

目前僅有付費版本，了解更多 mybatis-mate 使用示例詳見：

https://gitee.com/baomidou/mybatis-mate-examples

? 作者?|??女友在高考
來源 |??cnblogs.com/javammc/p/15555744.html
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