使用mybatis拦截器模糊查询统一处理%_字符

代码mybatis版本为3.0.6，版本不同可能写法有点不同

数据库为oracle数据库

package com.iris.egrant.orm.mybatis;

import org.apache.ibatis.builder.SqlSourceBuilder;
import org.apache.ibatis.builder.xml.dynamic.DynamicContext;
import org.apache.ibatis.builder.xml.dynamic.SqlNode;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlSource;
import org.apache.ibatis.plugin.*;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.factory.DefaultObjectFactory;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.DefaultObjectWrapperFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

@Intercepts({@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})})
public class QueryStringEscapeInterceptor implements Interceptor {

    private static final ObjectFactory DEFAULT_OBJECT_FACTORY = new DefaultObjectFactory();
    private static final ObjectWrapperFactory DEFAULT_OBJECT_WRAPPER_FACTORY = new DefaultObjectWrapperFactory();
    private static final String ROOT_SQL_NODE = "sqlSource.rootSqlNode";

    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        Object parameter = invocation.getArgs()[1];
        MappedStatement statement = (MappedStatement) invocation.getArgs()[0];
        MetaObject metaMappedStatement = MetaObject.forObject(statement, DEFAULT_OBJECT_FACTORY, DEFAULT_OBJECT_WRAPPER_FACTORY);
        BoundSql boundSql = statement.getBoundSql(parameter);
        if (metaMappedStatement.hasGetter(ROOT_SQL_NODE)) {
            SqlNode sqlNode = (SqlNode) metaMappedStatement.getValue(ROOT_SQL_NODE);
            Configuration configuration=statement.getConfiguration();
            Object parameterObject=boundSql.getParameterObject();
            DynamicContext context = new DynamicContext(statement.getConfiguration(), boundSql.getParameterObject());
            sqlNode.apply(context);
            String countextSql = context.getSql();
            SqlSourceBuilder sqlSourceParser = new SqlSourceBuilder(configuration);
            Class parameterType = parameterObject == null ? Object.class : parameterObject.getClass();
            String sql = modifyLikeSql(countextSql, parameterObject);
            SqlSource sqlSource = sqlSourceParser.parse(sql, parameterType);

            boundSql = sqlSource.getBoundSql(parameterObject);
            for (Map.Entry entry : context.getBindings().entrySet()) {
                boundSql.setAdditionalParameter(entry.getKey(), entry.getValue());
            }
            
            MappedStatement newMs = newMappedStatement(statement,sqlSource);
            invocation.getArgs()[0]=newMs;
        }
        return invocation.proceed();
    }
    
    private MappedStatement newMappedStatement(MappedStatement ms, SqlSource newSqlSource) {
        MappedStatement.Builder builder = new
                MappedStatement.Builder(ms.getConfiguration(), ms.getId(), newSqlSource, ms.getSqlCommandType());
        builder.resource(ms.getResource());
        builder.fetchSize(ms.getFetchSize());
        builder.statementType(ms.getStatementType());
        builder.keyGenerator(ms.getKeyGenerator());
        builder.timeout(ms.getTimeout());
        builder.parameterMap(ms.getParameterMap());
        builder.resultMaps(ms.getResultMaps());
        builder.resultSetType(ms.getResultSetType());
        builder.cache(ms.getCache());
        builder.flushCacheRequired(ms.isFlushCacheRequired());
        builder.useCache(ms.isUseCache());
        return builder.build();
    }

    @Override
    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    @Override
    public void setProperties(Properties properties) {
    }

    public static String modifyLikeSql(String sql, Object parameterObject) {
        if (!sql.toLowerCase().contains("like")) {
            return sql;
        }
        String reg="\\s\\w*.?\\w+\\slike\\s*('%'\\s*\\|{2}\\s*)?(#\\{\\w+\\})(\\s*\\|{2}\\s*'%')?";
        Pattern pattern = Pattern.compile(reg, Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(sql);

        List replaceFiled = new ArrayList();
        List replaceEscape=new ArrayList();

        while (matcher.find()) {
            replaceEscape.add(matcher.group());
            int n = matcher.groupCount();
            for (int i = 0; i <= n; i++) {
                String output = matcher.group(i);
                if (output != null) {
                    String key = getParameterKey(output);
                    if (replaceFiled.indexOf(key) < 0) {
                        replaceFiled.add(key);
                    }
                }
            }
        }
        for(String s:replaceEscape)
        {
            sql=sql.replace(s, s+" ESCAPE '/' ");
        }
        // 修改参数
        MetaObject metaObject = MetaObject.forObject(parameterObject, DEFAULT_OBJECT_FACTORY, DEFAULT_OBJECT_WRAPPER_FACTORY);
        for (String key : replaceFiled) {
            Object val = metaObject.getValue(key);
            if (val != null && val instanceof String && (val.toString().contains("%") || val.toString().contains("_"))) {
                val = val.toString().replaceAll("/%", "%").replaceAll("/_", "_").replaceAll("%", "/%").replaceAll("_", "/_");
                metaObject.setValue(key, val);
            }
        }
        return sql;
    }

    private static String getParameterKey(String input) {
        String key = "";
        String[] temp = input.split("#");
        if (temp.length > 1) {
            key = temp[1];
            key = key.replace("{", "").replace("}", "").split(",")[0];
        }
        return key.trim();
    }

}