需求

在maven编译过程中,获取mybatis的sql

核心基础

org.apache.ibatis.binding.MapperMethod#getParam

  private Object getParam(Object[] args) {
    final int paramCount = paramPositions.size();
    if (args == null || paramCount == 0) {
      return null;
    } else if (!hasNamedParameters && paramCount == 1) {
      return args[paramPositions.get(0)];
    } else {
      Map<String, Object> param = new MapperParamMap<Object>();
      for (int i = 0; i < paramCount; i++) {
        param.put(paramNames.get(i), args[paramPositions.get(i)]);
      }
      // issue #71, add param names as param1, param2...but ensure backward compatibility
      for (int i = 0; i < paramCount; i++) {
        String genericParamName = "param" + String.valueOf(i + 1);
        if (!param.containsKey(genericParamName)) {
          param.put(genericParamName, args[paramPositions.get(i)]);
        }
      }
      return param;
    }
  }

核心代码

获取参数

    private Object getMethodParamValues(Method method){
        int paraCount = method.getParameterTypes().length;
        if(paraCount <= 1){
            return null;
        }
        return Maps.newHashMap();
    }

获取sql

mappedStatement.getBoundSql(paramValues).getSql();