wallFilter對sql有著嚴格的校驗，會對有風險的sql過濾，拋出異常信息；

org.springframework.jdbc.UncategorizedSQLException:
### Error querying database. Cause: java.sql.SQLException: sql injection violation, syntax error: syntax error, expect RPAREN, actual IDENTIFIER ） : select nvl(sum(decode(fpztbz, ‘0‘,1, 0)),0) zcpfs, nvl(sum(decode(fpztbz, ‘1‘, 1, 0)),0) tpfs,

...

解決辦法，關閉語法檢測-----StrictSyntaxCheck(false)

 wallConfig.setStrictSyntaxCheck(false);//是否進行嚴格的語法檢測，Druid SQL Parser在某些場景不能覆蓋所有的SQL語法，出現解析SQL出錯，可以臨時把這個選項設置為false，同時把SQL反饋給Druid的開發者。
 

配置示例：

import com.alibaba.druid.filter.Filter;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import com.alibaba.druid.wall.WallConfig;
import com.alibaba.druid.wall.WallFilter;
import com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

/**
 * ClassName: DruidConfig <br>
 * Function: Druid連接池初始化 <br>
 * @version
 * @since JDK 1.8
 */
@Configuration
public class DruidConfig {

    private Logger logger = LoggerFactory.getLogger(DruidConfig.class);

    @Value("${spring.datasource.url}")
    private String dbUrl;

    @Value("${spring.datasource.username}")
    private String username;

    @Value("${spring.datasource.password}")
    private String password;

    @Value("${spring.datasource.driverClassName}")
    private String driverClassName;

    @Value("${spring.datasource.initialSize}")
    private int initialSize;

    @Value("${spring.datasource.minIdle}")
    private int minIdle;

    @Value("${spring.datasource.maxActive}")
    private int maxActive;

    @Value("${spring.datasource.maxWait}")
    private int maxWait;

    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;

    @Value("${spring.datasource.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;

    @Value("${spring.datasource.validationQuery}")
    private String validationQuery;

    @Value("${spring.datasource.testWhileIdle}")
    private boolean testWhileIdle;

    @Value("${spring.datasource.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${spring.datasource.testOnReturn}")
    private boolean testOnReturn;

    @Value("${spring.datasource.filters}")
    private String filters;

    @Value("${mybatis-plus.mapper-locations}")
    private String mapperLocations;
    @Autowired
    WallFilter wallFilter;




    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean reg = new ServletRegistrationBean();
        reg.setServlet(new StatViewServlet());
        reg.addUrlMappings("/druid/*");
        reg.addInitParameter("loginUsername", username);
        reg.addInitParameter("loginPassword", password);
        return reg;
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean
            .addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        filterRegistrationBean.addInitParameter("profileEnable", "true");
        return filterRegistrationBean;
    }

    @Bean
    public DataSource druidDataSource() {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(dbUrl);
        datasource.setUsername(username);
        datasource.setPassword(password);
        datasource.setDriverClassName(driverClassName);
        datasource.setInitialSize(initialSize);
        datasource.setMinIdle(minIdle);
        datasource.setMaxActive(maxActive);
        datasource.setMaxWait(maxWait);
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setValidationQuery(validationQuery);
        datasource.setTestWhileIdle(testWhileIdle);
        datasource.setTestOnBorrow(testOnBorrow);
        datasource.setTestOnReturn(testOnReturn);
        // filter
        List<Filter> filterArrayList = new ArrayList<>();
        filterArrayList.add(wallFilter);
        datasource.setProxyFilters(filterArrayList);

        try {
            datasource.setFilters(filters);
        } catch (SQLException e) {
            logger.error("druid configuration initialization filter", e);
        }
        return datasource;
    }

    @Bean(name = "wallFilter")
    @DependsOn("wallConfig")
    public WallFilter wallFilter(WallConfig wallConfig) {
        WallFilter wallFilter = new WallFilter();
        wallFilter.setConfig(wallConfig);
        return wallFilter;
    }

    @Bean(name = "wallConfig")
    public WallConfig wallConfig() {
        WallConfig wallConfig = new WallConfig();
        wallConfig.setMultiStatementAllow(true);//允許一次執行多條語句
        wallConfig.setNoneBaseStatementAllow(true);//允許一次執行多條語句
        wallConfig.setStrictSyntaxCheck(false);//是否進行嚴格的語法檢測，Druid SQL Parser在某些場景不能覆蓋所有的SQL語法，出現解析SQL出錯，可以臨時把這個選項設置為false，同時把SQL反饋給Druid的開發者。
        return wallConfig;
    }
}

數據庫連接池-配置 wallfilter問題解決-UncategorizedSQLException