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package com.Config;
import org.apache.ibatis.binding.MapperMethod;
import org.apache.ibatis.cache.CacheKey;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import java.util.HashMap;
import java.util.List;
import java.util.Properties;
@Intercepts(
{
@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class, CacheKey.class, BoundSql.class}),
@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class}),
@Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class})
}
)
public class CustomPlugin implements Interceptor {
@Override
public Object intercept(Invocation invocation) throws Throwable {
Object[] args = invocation.getArgs();
MappedStatement ms = (MappedStatement) args[0];
Object parameter = args[1];
Executor executor = (Executor) invocation.getTarget();
CacheKey cacheKey = null;
BoundSql boundSql = null;
Class<?> type = ms.getParameterMap().getType();
if (args.length >= 4) {
boundSql = ms.getBoundSql(parameter);
ResultHandler resultHandler = (ResultHandler) args[3];
RowBounds rowBounds = (RowBounds) args[2];
cacheKey = executor.createCacheKey(ms, parameter, rowBounds, boundSql);
if (args.length == 6) {
cacheKey = (CacheKey) args[4];
boundSql = (BoundSql) args[5];
}
String sql = getSql(boundSql, type);
//log.debug("runing query(dql) sql:{}", sql);
return executor.query(ms, parameter, rowBounds, resultHandler, cacheKey, boundSql);
} else if (args.length == 2) {
// update
boundSql = ms.getBoundSql(parameter);
String sql = getSql(boundSql, type);
//log.debug("runing update(dml) sql:{}", sql);
return executor.update(ms, parameter);
} else {
throw new RuntimeException("无效拦截");
}
}
private String getSql(BoundSql boundSql, Class<?> type) {
String sql = boundSql.getSql();
final String[] temp = {sql};
if (sql.contains("?") && boundSql.getParameterMappings().size() > 0 && boundSql.getParameterObject() != null) {
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
Object parameterObject = boundSql.getParameterObject();
//多参数
if (parameterObject instanceof HashMap) {
MapperMethod.ParamMap parameterObject1 = (MapperMethod.ParamMap) parameterObject;
parameterMappings.forEach(parameters -> {
String property = parameters.getProperty();
// todo 拦截过滤，大小过滤
String strs = String.valueOf(parameterObject1.get(property));
if (strs != null) {
temp[0] = temp[0].replaceFirst("\\?", "'" + strs + "'");
}
});
} else if (parameterObject instanceof String) {
// 单参数
parameterMappings.forEach(parameters -> {
// todo 拦截过滤，大小过滤
String strs = String.valueOf(parameterObject);
temp[0] = temp[0].replaceFirst("\\?", "'" + strs + "'");
});
} else if (parameterObject.getClass().isAssignableFrom(type)) {
// 对象类型
String ss = parameterObject.toString();
String substring = ss;
String[] strings = new String[1];
strings[0] = ss;
substring = substring.replaceFirst("\\(", "");
substring = substring.replaceFirst("\\)", "");
if (substring.contains("(") || substring.contains(")")) {
// 不管, 显示全部j对象数据
} else {
substring = strings[0];
substring = substring.replaceAll(" ", "");
HashMap<String, String> map = new HashMap<>();
int i = substring.indexOf("(");
int i1 = substring.lastIndexOf(")");
if (i != -1 && i1 != -1) {
substring = substring.substring(i + 1, i1);
}
// 若不存在复合类型的精准提供
String[] split = substring.split(",");
if (split.length > 0) {
for (String s : split) {
int i2 = s.indexOf("=");
String key = s.substring(0, i2);
String value = s.substring(i2 + 1);
map.put(key, value);
}
}
parameterMappings.forEach(parameters -> {
String property = parameters.getProperty();
String strs = String.valueOf(map.get(property));
temp[0] = temp[0].replaceFirst("\\?", "'" + strs + "'");
});
}
}
}
//TODO 自己要进行的各种处理
return temp[0];
}
@Override
public Object plugin(Object target) {
return Plugin.wrap(target, this);
}
@Override
public void setProperties(Properties properties) {
//
}
}