增加租户的功能

src/main/java/com/jsh/erp/config/TenantConfig.java

@@ -0,0 +1,100 @@
+package com.jsh.erp.config;
+
+import com.baomidou.mybatisplus.core.parser.ISqlParser;
+import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.PerformanceInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.tenant.TenantHandler;
+import com.baomidou.mybatisplus.extension.plugins.tenant.TenantSqlParser;
+import net.sf.jsqlparser.expression.Expression;
+import net.sf.jsqlparser.expression.LongValue;
+import org.mybatis.spring.mapper.MapperScannerConfigurer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.ArrayList;
+import java.util.List;
+
+@Configuration
+public class TenantConfig {
+
+    @Bean
+    public PaginationInterceptor paginationInterceptor(HttpServletRequest request) {
+        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
+        List<ISqlParser> sqlParserList = new ArrayList<>();
+        TenantSqlParser tenantSqlParser = new TenantSqlParser();
+        tenantSqlParser.setTenantHandler(new TenantHandler() {
+            @Override
+            public Expression getTenantId() {
+                //从session中获取租户id
+                Object tenantId = request.getSession().getAttribute("tenantId");
+                if(tenantId!=null){
+                    return new LongValue(Long.parseLong(tenantId.toString()));
+                } else {
+                    return null;
+                }
+            }
+
+            @Override
+            public String getTenantIdColumn() {
+                return "tenant_id";
+            }
+
+            @Override
+            public boolean doTableFilter(String tableName) {
+                //从session中获取租户id
+                Object mybatisPlusStatus = request.getSession().getAttribute("mybatisPlusStatus");
+                if(mybatisPlusStatus !=null && mybatisPlusStatus.toString().equals("open")) {
+                    // 这里可以判断是否过滤表
+                    if ("databasechangelog".equals(tableName) || "databasechangeloglock".equals(tableName)
+                            || "jsh_materialproperty".equals(tableName) || "tbl_sequence".equals(tableName) || "dual".equals(tableName)
+                            || "jsh_userbusiness".equals(tableName) || "jsh_app".equals(tableName) || "jsh_functions".equals(tableName)) {
+                        return true;
+                    } else {
+                        return false;
+                    }
+                } else {
+                    return true;
+                }
+            }
+        });
+
+        sqlParserList.add(tenantSqlParser);
+        paginationInterceptor.setSqlParserList(sqlParserList);
+//        paginationInterceptor.setSqlParserFilter(new ISqlParserFilter() {
+//            @Override
+//            public boolean doFilter(MetaObject metaObject) {
+//                MappedStatement ms = PluginUtils.realTarget(metaObject);
+//                // 过滤自定义查询此时无租户信息约束出现
+//                if ("com.jsh.erp.datasource.mappers.DepotHeadMapperEx.getBuildOnlyNumber".equals(ms.getId())) {
+//                    return true;
+//                }
+//                return false;
+//            }
+//        });
+        return paginationInterceptor;
+    }
+
+    /**
+     * 相当于顶部的：
+     * {@code @MapperScan("com.jsh.erp.datasource.mappers*")}
+     * 这里可以扩展，比如使用配置文件来配置扫描Mapper的路径
+     */
+    @Bean
+    public MapperScannerConfigurer mapperScannerConfigurer() {
+        MapperScannerConfigurer scannerConfigurer = new MapperScannerConfigurer();
+        scannerConfigurer.setBasePackage("com.jsh.erp.datasource.mappers*");
+        return scannerConfigurer;
+    }
+
+
+    /**
+     * 性能分析拦截器，不建议生产使用
+     */
+    @Bean
+    public PerformanceInterceptor performanceInterceptor(){
+        return new PerformanceInterceptor();
+    }
+
+
+}